1 Question 1 Calculate the hot particle beta skin dose rate in Gy/Sec for a 0.1 Bq particle of 98Tc on the arm. The decay scheme of 98 Tc is attached. Note that E(i) for beta particles listed in the decay scheme is the beta average energy./n2 Question 2 You have an aluminum-walled dosimeter with an inner collection volume of 1.8 cm³, filled with a standard counting gas (you can assume "air"). The dosimeter is placed in a 100 keV photon field (the detector wall is just thick enough for electronic equilibrium at 100 keV). The charge collection rate is 2.6×10-9 C/sec. Calculate (a) the dose rate in Gy/Sec to the collection volume; (b) the dose rate in Gy/Sec to the wall of the detector; (c) the dose rate in Gy/Sec to air outside the detector; and (d) the dose rate to a person (water) in Gy/Sec if they were standing in the same spot as the detector./n3 Question 3 Similar to the rule-of-thumb I [A] @ 1 foot = 6CEY (where C is activity in Curies, E is gamma energy in MeV, and Y is the gamma yield), deter- mine a separate rule-of-thumb for 600 keV photons that provides exposure rate in units of mR/min 1 yard, given that 1 yard = 0.9144 meter and error in the rule-of- Γ = 194.5 [hr CEMEV] hr-Ci-MeV E(MeV) [Hen (T)]. State the P thumb if someone were to use it for 1.25 MeV photons.

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