Observations on the long-lived Mossbauer effects of93mNb.
Several observations of the Nb long-lived Mossbauer phenomena are presented, in consequence of an irradiation increased by an order of magnitude compared with previous work. These are 1) two β decays of182Ta and92mNb are enhanced, i.e.,182Ta is now 200 times faster than in previous results while92mNb is twice as fast as normal; 2) γs emitted from two β decays compete to eject electrons in a winner-takes-all rule, rather than by superposition; 3) abrupt spectral changes reveal three decay phases of182Ta; 4) the biphoton γγ of93mNb is released from the sample for the first time; 5) the γγ distribution is narrow, in contrast to the broad γγ spectrum obtained from independent nuclei; 6) Nb K-lines super-radiate along the long sample axis; 7) collective scattering of multipolar MeV γs. The manipulation of nuclear decay speeds demonstrated here highlights a potential application of this work in cleaning up the nuclear wastes.
Department of Engineering Physics, Tsinghua University, Beijing, Haidian, 100084, China.
Yao
Y
Cheng
Haidian, 100085, Beijing, China.
Shi-Hui
SH
Yang
Ho Kang Technology Co., Ltd., Hsinchu, 30091, Taiwan.
Michael
M
Lan
Department of Engineering and System Science, National Tsing Hua University, Hsinchu, 30013, Taiwan.|Institue of Nuclear Engineering and Science, National Tsing Hua University, Hsinchu, 30013, Taiwan.
Chih-Hao
CH
Lee