what is true about gamma emission. (i) Gamma emission is the result of a nucleus
ID: 1768358 • Letter: W
Question
what is true about gamma emission.
(i) Gamma emission is the result of a nucleus falling form a high energy level to a low energy level.
(ii) Gamma radiations are high energy electromagnetic radiations.
(iii) The emission of a gamma radiation results in a daughter element two units less in atomic number and four units less in mass number.
(iv) Gamma radiations can be stopped by a thin layer of?? paper?
Choose the statement(s) that is/are true about the neutron multiplication factor k
(i) To sustain a controlled chain reaction, k has to have a value less than 1
(ii) In order to sustain a chain reaction, k must have a value greater than 1
(iii) For k > 1, the fission rate will increase exponentially
(iv) No further fission will happen for k = 1??
In nuclear fission, the neutron multiplication factor k is
the number of neutrons that escape the mass of the fission material.Explanation / Answer
In nuclear fission, the neutron multiplication factor k is
(iii) The emission of a gamma radiation results in a daughter element two units less in atomic number and four units less in mass number.
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ii, iii,iv are true
(ii) In order to sustain a chain reaction, k must have a value greater than 1
(iii) For k > 1, the fission rate will increase exponentially
(iv) No further fission will happen for k = 1??
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The average number of neutrons from one fission that are available to cause further fissions in other nuclei.
k = number of neutron in one generation / number of neutron in preceeding generation
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