Mass of the Top Quark

I have a physics assignment, the purpose of which is to determine the mass of the top quark from proton-antiproton collision data gathered at Fermi National Accelerator Laboratory in 1995. Please go to www.google.com In the search box, put in quotes "since protons have the same mass" and click Search. The first file you see is the PDF file which is my assignment. I have to do 1, 2, 3. In the assignment, it says to find three other students...I don't have to. I just have to work with Run 92704 (Event 14022), which is the last page of the PDF incidentally. So, can you please direct me how to do problems 1,2, and 3 (as pertaining to Event 14022 remember!), and what work I would need ... click for more

Atomic Physics Question

Question: The naturally occurring isotopes of potassium are: 39 K (abundance 93.10%) 40 k (abundance 0.0118%) 41 k (abundance 6.88%) 40K is radioactive and decays by Beta- decay with a half life of 1.29 mulitplied by 10`9 years. a) How many protons and neutrons do each of the three isotopes of potassium have? b) Calculate the atomic weight of naturally occurring potassium. c) What is the daughter nucleus of 40K? Explain why. d) What percentage of 40K nuclei will decay in the next 10 000 years? e) What is the value in second-1 of the decay constant (y - this should be an upside down y) for 40k? f) Using the definitions for the decay constant and for the becquerel, ca... click for more

Seeking 2 answers to previously asked Question on Atomic Physics

The naturally occurring isotopes of Potassium are: 39 K (abundance 93.10%) 40 K (abundance 0.0118%) 41 K (abundance 6.88%) d) What percentage of 40 K nuclei will decay in the next 10 000 years? (The answer that i seeked from brain mass before was provided to me as 1.000005373, and therefore alomost 100% of the original nuclei would remain after 10 000 years, my teacher said this was incorrect and that the answer cant be greater than 1 means more not less) f) Using the definitions for the decay constant and for the becquerel, calculate the activity of 1 gram of naturally occurring potassium? (Note: 6.02 multiplied 10 '23 (i.e 1 mole) atoms of any element will have a mass in gr... click for more

Atomic Physics Question

Other information - The naturally occurring isotopes of Potassium are: 39K (abundance 93.10%) 40K (abundance 0.0118%) 41k (abundance 6.88%) 40 K is radioactive and decays by B-decay with a half life of 1.29 multiplied by 10'9 years. Question: Using the definitions for the decay constant and for the becquerel. calculate the activity of 1 gram of naturally occurring potassium? (Note: 6.02 multiplied by 10'23 (i.e 1 mole) atoms of any element wll have a mass in grams equal to its atomic weight, for example, 6.02 multiplied by 10'23 atoms of calcium will weigh 40.08 grams.)

You have a neutron with a kerma of some amount. How do you calculate the fluence?

You have a neutron with a kerma of some amount. How do you calculate the fluence?