The collimator in a gamma camera is the first part through which a gamma ray passes when entering the camera. The collimator is made of lead septa to prevent non-perpendicular gamma rays interacting with the crystal. This process allows for reduction of scattered gamma rays entering the camera and also provides a better mechanism for determining the position the gamma ray has entered the system from this is particularly relevant in multiple headed gamma cameras used for performing SPECT acquisitions.
i find the range of alpha beta and gamma animation rather confusing- we teach that gamma travels very far (several metres) and that beta travels up to 2 metres
the animation show both tailing off before a metre. Can anyone shed any light on this please?
Greetings Julian! Furry Elephant Rocks! I'm not a physics student but have recently become very curious about the subject.
I have a question and I don't know who to ask so I'm posting here.... I hope you don't mind! I have heard it said casually that the mass defect when two protons are brought together is 0.07% of the mass of two unbound protons. I am curious what exactly those two protons become? Do they start as two protons then become one proton and one neutron? And the energy released, the "binding energy" which is the "mass defect" when converted to kg using Einstein's famous equation, is it this famous 0.07% that goes missing? Did I understand this correctly? And does anyone know what in the world this missing mass/energy is? Where in the universe does it go? And if protons are fuzzy balls of probability, then how are binding energies so predictable?
In all IGCSE syllabus, the penetration affect of each of the different types of radiation is clear, but according to the demonstration on the penetration affect of Gamma radiation it suggests that the count rate returns to zero with 60cm or so of air.
This is confusing am I using the simulation wrong?
otr214426 INTERNATIONAL CONCEPT OF WORK FROM HOME Work from home theory is fast gaining popularity because of the freedom and flexibility that comes with it. Since one is not bound by fixed working hours, they can schedule their work at the time when they feel most productive and convenient to them. Women & Men benefit a lot from this concept of work since they can balance their home and work perfectly. People mostly find that in this situation, their productivity is higher and stress levels lower. Those who like isolation and a tranquil work environment also tend to prefer this way of working. Today, with the kind of communication networks available, millions of people worldwide are considering this option.
Women & Men who want to be independent but cannot afford to leave their responsibilities at home aside will benefit a lot from this concept of work. It makes it easier to maintain a healthy balance between home and work. The family doesn't get neglected and you can get your work done too. You can thus effectively juggle home responsibilities with your career. Working from home is definitely a viable option but it also needs a lot of hard work and discipline. You have to make a time schedule for yourself and stick to it. There will be a time frame of course for any job you take up and you have to fulfill that project within that time frame.
There are many things that can be done working from home. A few of them is listed below that will give you a general idea about the benefits of this concept.
Baby-sitting This is the most common and highly preferred job that Women & Men like doing. Since in today's competitive world both the parents have to work they need a secure place to leave behind their children who will take care of them and parents can also relax without being worried all the time. In this job you don't require any degree or qualifications. You only have to know how to take care of children. Parents are happy to pay handsome salary and you can also earn a lot without putting too much of an effort.
Nursery For those who have a garden or an open space at your disposal and are also interested in gardening can go for this method of earning money. If given proper time and efforts nursery business can flourish very well and you will earn handsomely. But just as all jobs establishing it will be a bit difficult but the end results are outstanding.
Freelance Freelance can be in different wings. Either you can be a freelance reporter or a freelance photographer. You can also do designing or be in the advertising field doing project on your own. Being independent and working independently will depend on your field of work and the availability of its worth in the market. If you like doing jewellery designing you can do that at home totally independently. You can also work on freelancing as a marketing executive working from home. Wanna know more, email us on workfromhome.otr214426@gmail.com and we will send you information on how you can actually work as a marketing freelancer.
Internet related work This is a very vast field and here sky is the limit. All you need is a computer and Internet facility. Whatever field you are into work at home is perfect match in the software field. You can match your time according to your convenience and complete whatever projects you get. To learn more about how to work from home, contact us today on workfromhome.otr214426@gmail.comand our team will get you started on some excellent work from home projects.
Diet food Since now a days Women & Men are more conscious of the food that they eat hence they prefer to have homemade low cal food and if you can start supplying low cal food to various offices then it will be a very good source of income and not too much of efforts. You can hire a few ladies who will help you out and this can be a good business.
creativity of writer is purely impressive. It has touched to the level of expertise with his writing. Everything is up to the mark. Written perfectly and I can use such information for my coming assignment. เรียน sat
It gives exhaustive learning of the subject. Everything written in this blog is near acceptable level. I am certain nobody can raise any issue about all the data conveyed here. Save the elephants volunteer
This is a brilliant explanation and animation. I've linked to it in my notes, but it is now blocked by chrome. I am happy to subscribe but are you likely to make these animations available in HTML5? If not would you mind if I screen shot your animation and added a link to it?
Welcome to the Furry Elephant science teaching blog
The animated physics lessons at www.furryelephant.com are used widely by schools all over the world.
We always receive interesting comments about our monthly science teaching newsletter so I thought it would be a good idea for people to have somewhere to post their thoughts for public view. This is it.
Each month I'll put our newsletter contents here and you can tell everyone what you think.
Thanks in advance for any input, good or bad.
Visit furryelephant.com
Click on the logo to see all the animated lessons about Electricity and Radioactivity
I am a Physics teacher and author of all the Furry Elephant animated lessons. I have a particular interest in how intelligent people misunderstand basic science in predictable ways and would like to know more about the History and Philosophy of Science.
I'm married to Celina, with two young children, Barney and Georgia.
The collimator in a gamma camera is the first part through which a gamma ray passes when entering the camera. The collimator is made of lead septa to prevent non-perpendicular gamma rays interacting with the crystal. This process allows for reduction of scattered gamma rays entering the camera and also provides a better mechanism for determining the position the gamma ray has entered the system from this is particularly relevant in multiple headed gamma cameras used for performing SPECT acquisitions.
ReplyDeleteI've been looking through to find anything onthe effect of a magnetic field on a,b,g. I couldn't find it. Did I miss it?
ReplyDeleteHi Matt, sorry about that it's in Radioactivity and Atomic Physics Explained, Lesson 9 - Atoms 3: The Nucleus from screen 147. Hope this helps.
ReplyDeletei find the range of alpha beta and gamma animation rather confusing- we teach that gamma travels very far (several metres) and that beta travels up to 2 metres
ReplyDeletethe animation show both tailing off before a metre. Can anyone shed any light on this please?
Greetings Julian! Furry Elephant Rocks! I'm not a physics student but have recently become very curious about the subject.
ReplyDeleteI have a question and I don't know who to ask so I'm posting here.... I hope you don't mind! I have heard it said casually that the mass defect when two protons are brought together is 0.07% of the mass of two unbound protons. I am curious what exactly those two protons become? Do they start as two protons then become one proton and one neutron? And the energy released, the "binding energy" which is the "mass defect" when converted to kg using Einstein's famous equation, is it this famous 0.07% that goes missing? Did I understand this correctly? And does anyone know what in the world this missing mass/energy is? Where in the universe does it go? And if protons are fuzzy balls of probability, then how are binding energies so predictable?
Every time I try to log in I get a message that there's a virus! I can't log in and really want to log in. Please advise. The error message follows:
ReplyDeleteThe requested URL could not be retrieved
While trying to retrieve the URL:
http://www.furryelephant.com/login.php?
subject=physics
The following error was encountered:
The requested object is INFECTED with the following viruses: Trojan-Downloader.JS.Iframe.chf
Please contact your service provider if you consider it incorrect.
Generated:
9/13/2011 3:28:13 PM
Kaspersky Anti-Virus 6.0 for Windows Workstations
In the "electroscope discharging by ionization" clip, the electrode's leaves should be oppositely charged with respect to the plate.
ReplyDeleteThis comment has been removed by the author.
ReplyDeleteIn all IGCSE syllabus, the penetration affect of each of the different types of radiation is clear, but according to the demonstration on the penetration affect of Gamma radiation it suggests that the count rate returns to zero with 60cm or so of air.
ReplyDeleteThis is confusing am I using the simulation wrong?
I want a sandwich.
ReplyDeleteotr214426
ReplyDeleteINTERNATIONAL CONCEPT OF WORK FROM HOME
Work from home theory is fast gaining popularity because of the freedom and flexibility that comes with it. Since one is not bound by fixed working hours, they can schedule their work at the time when they feel most productive and convenient to them. Women & Men benefit a lot from this concept of work since they can balance their home and work perfectly. People mostly find that in this situation, their productivity is higher and stress levels lower. Those who like isolation and a tranquil work environment also tend to prefer this way of working. Today, with the kind of communication networks available, millions of people worldwide are considering this option.
Women & Men who want to be independent but cannot afford to leave their responsibilities at home aside will benefit a lot from this concept of work. It makes it easier to maintain a healthy balance between home and work. The family doesn't get neglected and you can get your work done too. You can thus effectively juggle home responsibilities with your career. Working from home is definitely a viable option but it also needs a lot of hard work and discipline. You have to make a time schedule for yourself and stick to it. There will be a time frame of course for any job you take up and you have to fulfill that project within that time frame.
There are many things that can be done working from home. A few of them is listed below that will give you a general idea about the benefits of this concept.
Baby-sitting
This is the most common and highly preferred job that Women & Men like doing. Since in today's competitive world both the parents have to work they need a secure place to leave behind their children who will take care of them and parents can also relax without being worried all the time. In this job you don't require any degree or qualifications. You only have to know how to take care of children. Parents are happy to pay handsome salary and you can also earn a lot without putting too much of an effort.
Nursery
For those who have a garden or an open space at your disposal and are also interested in gardening can go for this method of earning money. If given proper time and efforts nursery business can flourish very well and you will earn handsomely. But just as all jobs establishing it will be a bit difficult but the end results are outstanding.
Freelance
Freelance can be in different wings. Either you can be a freelance reporter or a freelance photographer. You can also do designing or be in the advertising field doing project on your own. Being independent and working independently will depend on your field of work and the availability of its worth in the market. If you like doing jewellery designing you can do that at home totally independently. You can also work on freelancing as a marketing executive working from home. Wanna know more, email us on workfromhome.otr214426@gmail.com and we will send you information on how you can actually work as a marketing freelancer.
Internet related work
This is a very vast field and here sky is the limit. All you need is a computer and Internet facility. Whatever field you are into work at home is perfect match in the software field. You can match your time according to your convenience and complete whatever projects you get. To learn more about how to work from home, contact us today on workfromhome.otr214426@gmail.comand our team will get you started on some excellent work from home projects.
Diet food
Since now a days Women & Men are more conscious of the food that they eat hence they prefer to have homemade low cal food and if you can start supplying low cal food to various offices then it will be a very good source of income and not too much of efforts. You can hire a few ladies who will help you out and this can be a good business.
Thus think over this concept and go ahead.
creativity of writer is purely impressive. It has touched to the level of expertise with his writing. Everything is up to the mark. Written perfectly and I can use such information for my coming assignment. เรียน sat
ReplyDeleteIt gives exhaustive learning of the subject. Everything written in this blog is near acceptable level. I am certain nobody can raise any issue about all the data conveyed here. Save the elephants volunteer
ReplyDeleteThis is a brilliant explanation and animation. I've linked to it in my notes, but it is now blocked by chrome. I am happy to subscribe but are you likely to make these animations available in HTML5? If not would you mind if I screen shot your animation and added a link to it?
ReplyDelete