Question

What thickness of lead shielding is needed around a 2000 Ci point source of Co-60 to...

What thickness of lead shielding is needed around a 2000 Ci point source of Co-60 to reduce the exposure rate to 10 mR/h at a distance of 2 m?

Science   Advanced-Physics   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
Calculate the thickness of a lead shield needed to reduce the exposure rate 1mfrom a 10-Ci...
Calculate the thickness of a lead shield needed to reduce the exposure rate 1mfrom a 10-Ci point source of 42K to 2.5mR/h. The decay scheme of the β–emitter is shown. The daughter 42Ca is stable
10-Ci point source of 24Na is to be stored at the bottom of a pool of...
10-Ci point source of 24Na is to be stored at the bottom of a pool of water. The radionuclide emits two photons per disintegration with energies 2.75 MeV and 1.37 MeV in decaying by β–emission to stable 24Mg. How deep must the water be if the exposure rate at a point 6 m directly above the source is not to exceed 20 mR/h? What is the exposure rate at the surface of the water right above the source
A point source of Co-60 gamma rays emits the same number of photons of 1.17 and...
A point source of Co-60 gamma rays emits the same number of photons of 1.17 and 1.33 MeV, with a total fluence rate of 5.7x109 photons cm-1 s -1 at a specified location. What is the energy fluence rate there, expressed in a) erg cm-2 s -1 ? b) J m-2 min-1 ?
A point source that emits beta particles at a rate of 107/s is to be shielded....
A point source that emits beta particles at a rate of 107/s is to be shielded. If the max beta energy is 3.0 MeV, what thickness of aluminum would be required to attenuate the beta particles, and what thickness of lead would need to be included to reduce the photon flux at 50 cm by a factor of 1000?
A cobalt-60 source with activity 2.60×10-4 Ci is embedded in a tumor that has mas 0.20...
A cobalt-60 source with activity 2.60×10-4 Ci is embedded in a tumor that has mas 0.20 kg. The source emits gamma photons with average energy 1.25 MeV. Half the photons are absorbed in the tumor, and half escape. i. What energy is delivered to the tumor per second? [4 marks] ii. What absorbed dose, in rad, is delivered per second? [2 marks] iii. What equivalent dose, in rem, is delivered per second if the RBE for these gamma rays is...
a 60 Co y-ray source used in radiation therapy has an activity of 5*10^9 Bq. the...
a 60 Co y-ray source used in radiation therapy has an activity of 5*10^9 Bq. the half life if 69 Co id 5.36 years. a.) what is the mass if the 60 Co in the source? b) this source is used to deliver radiation to a .2 kg tumor. it is placed so that 50% of the radiation from the source is absorbed by the tumor. each decay delivers an average of 1.2MeV of energy. the treatment lasts for 10...
Two cars start moving from the same point. One travels south at 60 mi/h and the...
Two cars start moving from the same point. One travels south at 60 mi/h and the other travels west at 50 mi/h. At what rate is the distance between the cars increasing 2 hours later? Round to the nearest hundredth.
An electronic point source emits sound isotropically at a frequency of 3 × 10^3 Hz and...
An electronic point source emits sound isotropically at a frequency of 3 × 10^3 Hz and a power of 25 watts. A small microphone has an area of 0.72 cm^2 and is located 4.12 meters from the point source. The speed of sound is 343 m/s. What is the sound intensity at the microphone? What is the power intercepted by the microphone? What is the sound intensity level (in dB) at the microphone from this point source? What would be...
If someone could answer these questions it would be greatly appreciated: 1. What is the MKS...
If someone could answer these questions it would be greatly appreciated: 1. What is the MKS unit for energy? 2. What is the energy required to raise a 3kg mass 15m? 3. What is the minimum power required to move a 200kg elevator 5m between floors in 3 seconds 4. What is the kinetic energy of a 6kg bowling ball traveling 2 meters per second 5. How much current should a 60 watt light bulb draw from a 120V outlet...
QUESTION 1 This source of Calcium ions provides 80-90% of the Ca++ needed for cardiac excitation...
QUESTION 1 This source of Calcium ions provides 80-90% of the Ca++ needed for cardiac excitation contraction coupling: a. the Nucleus b. the Extracellular Fluid and the fluid inside T-tubules c. the Mitochondria d. the Sarcoplasmic Reticulum QUESTION 2 During Isovolumetric Contraction, which one of the following statements is FALSE a. The ventricle is in SYSTOLE b. The Left-AV valve is CLOSED c. The Aortic Valve is CLOSED d. The Ventricular Pressure is Increasing e. The Ventricle is in DIASTOLE...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT