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Thousands of volunteers helped identify this strange gamma-ray source

Thousands of volunteers helped identify this strange gamma-ray source

2021年2月6日

Digital TrendsGeorgina Torbet

$SOLVED:Radioactive cobalt-60 is used extensively in nuclear medicine as a γ-ray source. It is made by a neutron capture reaction from cobalt-59, and it is a βemitter; βemission is accompanied by strong γradiation. The half-life of cobalt-60 is 5.27 years. (a) How long will it take for a cobalt-60 source to decrease to one eighth of its original activity? (b) What fraction of the activity of a cobalt-60 source remains after 1.0 year?$

SOLVED:Radioactive cobalt-60 is used extensively in nuclear medicine as a γ-ray source. It is made by a neutron capture reaction from cobalt-59, and it is a βemitter; βemission is accompanied by strong γradiation. The half-life of cobalt-60 is 5.27 years. (a) How long will it take for a cobalt-60 source to decrease to one eighth of its original activity? (b) What fraction of the activity of a cobalt-60 source remains after 1.0 year?

2020年5月1日

SOLVED: 'How do you solve this3. Cobalt-60 is an artificial radioisotope that is produced in nuclear reactor for use as gamma-ray source in the treatment of certain types of cancer: If the wavelength of the gamma radiation from 2 cobalt-60 source is 1.00 X 10-12 nm, calculate the energy ofa photon of this radiation.'

SOLVED: 'How do you solve this3. Cobalt-60 is an artificial radioisotope that is produced in nuclear reactor for use as gamma-ray source in the treatment of certain types of cancer: If the wavelength of the gamma radiation from 2 cobalt-60 source is 1.00 X 10-12 nm, calculate the energy ofa photon of this radiation.'

2023年1月2日

X-ray pulses from Cygnus X-1, a celestial gamma-ray source, hav... | Filo

X-ray pulses from Cygnus X-1, a celestial gamma-ray source, hav... | Filo

SOLVED: A radioactive gamma-ray source generates an effective dose rateof 20 Sv/h. Which of the following is closest to the dose rate thatwould be found after the gamma ray has travelled through 10 mm oflead? Assume that the attenuation coefficient is 3.5cm-1 and the build-up factor is 4.0.A.84.6 Sv/hB.17.6 Sv/hC.7.6 x 10-14 Sv/hD.2.4 Sv/h

SOLVED: A radioactive gamma-ray source generates an effective dose rateof 20 Sv/h. Which of the following is closest to the dose rate thatwould be found after the gamma ray has travelled through 10 mm oflead? Assume that the attenuation coefficient is 3.5cm-1 and the build-up factor is 4.0.A.84.6 Sv/hB.17.6 Sv/hC.7.6 x 10-14 Sv/hD.2.4 Sv/h

2021年9月25日

SOLVED:A shielded γ-ray source yields a dose rate of 0.048 rad/h at a distance of 1.0 m for an average-sized person. If workers are allowed a maximum dose of 5.0 rem in 1 year, how close to the source may they operate, assuming a 35-h work week? Assume that the intensity of radiation falls off as the square of the distance. (It actually falls off more rapidly than 1/r^2 because of absorption in the air, so your answer will give a better-than-permissible value.)

SOLVED:A shielded γ-ray source yields a dose rate of 0.048 rad/h at a distance of 1.0 m for an average-sized person. If workers are allowed a maximum dose of 5.0 rem in 1 year, how close to the source may they operate, assuming a 35-h work week? Assume that the intensity of radiation falls off as the square of the distance. (It actually falls off more rapidly than 1/r^2 because of absorption in the air, so your answer will give a better-than-permissible value.)

2019年12月7日

SENTINEL 880 Series Gamma-Ray Source Projectors | QSA Global, Inc.

SENTINEL 880 Series Gamma-Ray Source Projectors | QSA Global, Inc.

2019年11月22日

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