通过熔合蒸发反应^(181)Ta(^(16)O,5n)^(192)Tl,在入射束流为97 Me V能量下,布居^(192)Tl的高自旋态,更新了^(192)Tl的能级纲图。共增加8条新能级,尝试性地指定了能级自旋,将负宇称晕带的能级推高到23-。讨论了^(192)Tl与相邻同位素奇奇...通过熔合蒸发反应^(181)Ta(^(16)O,5n)^(192)Tl,在入射束流为97 Me V能量下,布居^(192)Tl的高自旋态,更新了^(192)Tl的能级纲图。共增加8条新能级,尝试性地指定了能级自旋,将负宇称晕带的能级推高到23-。讨论了^(192)Tl与相邻同位素奇奇核^(194,196,198)Tl负宇称晕带的旋称劈裂与反转现象,发现随着中子数增加,^(196,198)Tl在高自旋处出现了旋称反转,其原因可能是由于中子质子相互作用与科里奥利力相互竞争所致。展开更多
A mini-orange spectrometer used for in-beam measurements of internal conversion electrons, consisting of a Si（Li） detector and different sets of Sm05 permanent magnets for filtering and transporting the conversion e...A mini-orange spectrometer used for in-beam measurements of internal conversion electrons, consisting of a Si（Li） detector and different sets of Sm05 permanent magnets for filtering and transporting the conversion electrons to the Si（Li） detector, has been developed at the China Institute of Atomic Energy. The working principles and configuration of the mini-orange spectrometer are described. The performance of the setup is illustrated by measured singles conversion electron spectra using the mini-orange spectrometer.展开更多
Excited states in the odd-A nucleus 71Ga have been studied via the ^(70)Zn(7Li,a2n)^(71)Ga fusion-evaporation reaction with incident beam energies of 30 and 35 MeV.The level scheme is established up to spin I^(n)=(29/...Excited states in the odd-A nucleus 71Ga have been studied via the ^(70)Zn(7Li,a2n)^(71)Ga fusion-evaporation reaction with incident beam energies of 30 and 35 MeV.The level scheme is established up to spin I^(n)=(29/2^(+))and an excitation energy-6.6 MeV.A previously known sequence built on the 9/2^(+) state is extended as a novel rotational band originating from the v(8^(2)_(9/2)alignment.Furthermore,a negative-parity sequence Is also reported.The observed energy levels of Ga have been interpreted in the framework of the nuclear shell model(SM).展开更多
The lifetime of the 2^+1 state in ^106Cd populated via the ^94Zr(^16O,4n)^106Cd reaction has been measured with the Recoil Distance Doppler Shift technique in combination with the Differential Decay Curve Method.By su...The lifetime of the 2^+1 state in ^106Cd populated via the ^94Zr(^16O,4n)^106Cd reaction has been measured with the Recoil Distance Doppler Shift technique in combination with the Differential Decay Curve Method.By subtracting the contamination in the data,the mean lifetime of the I^π=2^+1633 keV state was determined as 9.9(12)ps.The B(E2)value calculated in this study is in good agreement with the experimental systematics and was compared to the shell model calculations.展开更多
文摘通过熔合蒸发反应^(181)Ta(^(16)O,5n)^(192)Tl,在入射束流为97 Me V能量下,布居^(192)Tl的高自旋态,更新了^(192)Tl的能级纲图。共增加8条新能级,尝试性地指定了能级自旋,将负宇称晕带的能级推高到23-。讨论了^(192)Tl与相邻同位素奇奇核^(194,196,198)Tl负宇称晕带的旋称劈裂与反转现象,发现随着中子数增加,^(196,198)Tl在高自旋处出现了旋称反转,其原因可能是由于中子质子相互作用与科里奥利力相互竞争所致。
基金Supported by National Natural Science Foundation of China(11305269,11375267,11475072,11405274,11205068,11175259)
文摘A mini-orange spectrometer used for in-beam measurements of internal conversion electrons, consisting of a Si（Li） detector and different sets of Sm05 permanent magnets for filtering and transporting the conversion electrons to the Si（Li） detector, has been developed at the China Institute of Atomic Energy. The working principles and configuration of the mini-orange spectrometer are described. The performance of the setup is illustrated by measured singles conversion electron spectra using the mini-orange spectrometer.
基金Supported by the National Natural Science Foundation of China(U1932209,11975315,U1867210,11905134)the Leading Innovation Project under Grant(LC192209000701,LC202309000201)+1 种基金the Continuous Basic Scientific Research Project(BJ20002501,WDJC-2019-13)China National Nuclear Corporation(FA18000201)。
文摘Excited states in the odd-A nucleus 71Ga have been studied via the ^(70)Zn(7Li,a2n)^(71)Ga fusion-evaporation reaction with incident beam energies of 30 and 35 MeV.The level scheme is established up to spin I^(n)=(29/2^(+))and an excitation energy-6.6 MeV.A previously known sequence built on the 9/2^(+) state is extended as a novel rotational band originating from the v(8^(2)_(9/2)alignment.Furthermore,a negative-parity sequence Is also reported.The observed energy levels of Ga have been interpreted in the framework of the nuclear shell model(SM).
基金Supported by National Key Research and Development Program of China(2017YFF0106501)National Natural Science Foundation of China(11905134,11975315,U1932209,11575118,11605114)+3 种基金NSFC-CNNC Joint Project for Nuclear Technology Innovation(U1867210)Continuous Basic Scientific Research Project(WDJC-2019-13)Project funded by China Post-doctoral Science Foundation(2019M652999)and National Natural Science Foundation of Guangdong China(2016A030310042)。
文摘The lifetime of the 2^+1 state in ^106Cd populated via the ^94Zr(^16O,4n)^106Cd reaction has been measured with the Recoil Distance Doppler Shift technique in combination with the Differential Decay Curve Method.By subtracting the contamination in the data,the mean lifetime of the I^π=2^+1633 keV state was determined as 9.9(12)ps.The B(E2)value calculated in this study is in good agreement with the experimental systematics and was compared to the shell model calculations.
