Radiation workers enter an area for 20 minutes in which they are subjectedto 50 keV neutron radiation at a dose rate of 10-6 Gy/hr. What dose in mSvdo they receive?What is the initial activity of a 5 g radioactive source of 60Co given that thespecific activity of 6⁰Co is 4.8 x 1016 Bq/kg? How many decays per seconddoes this correspond to? After twenty years what activity does this sourcestill provide if 6⁰Co has a half life of 5.3 years?What is the initial intensity, I, of the 5 g 6⁰Co source at a distance of 1m if thegamma rays emitted by 60Co have an average energy of 1.9 x 10-1³ J?What thickness of lead would be necessary to reduce the intensity of theradiation by a factor of 10 at this distance if the absorption coefficient of leadto gamma is 0.9 cm-¹?If the source was changed to one from which the gamma rays had an energyof 0.6 x 10-13 J, what thickness of lead would be necessary to reduce theintensity of the radiation by a factor of 10? Look at graph on slide 27 andremember the MeV J 1.6x10-1⁹ conversion.

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Radiation workers enter an area for 20 minutes in which they are subjected to 50 keV neutron radiation at a dose rate of 10-6 Gy/hr. What dose in mSv do they receive? What is the initial activity of a 5 g radioactive source of 60Co given that the specific activity of 6⁰Co is 4.8 x 1016 Bq/kg? How many decays per second does this correspond to? After twenty years what activity does this source still provide if 6⁰Co has a half life of 5.3 years?

Radiation workers enter an area for 20 minutes in which they are subjected to 50 keV neutron radiation at a dose rate of 10-6 Gy/hr. What dose in mSv do they receive? What is the initial activity of a 5 g radioactive source of 60Co given that the specific activity of 6⁰Co is 4.8 x 1016 Bq/kg? How many decays per second does this correspond to? After twenty years what activity does this source still provide if 6⁰Co has a half life of 5.3 years?

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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