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= 8
two-quasineutron isomer in 
PuHota, S.*; Tandel, S.*; Chowdhury, P.*; Ahmad, I.*; Carpenter, M. P.*; Chiara, C. J.*; Greene, J. P.*; Hoffman, C. R.*; Jackson, E. G.*; Janssens, R. V. F.*; et al.
Physical Review C, 94(2), p.021303_1 - 021303_5, 2016/08
Times Cited Count：6 Percentile：44.49(Physics, Nuclear)The decay of a = 8 isomer in Pu and the collective band structure populating the isomer are studied using deep inelastic excitations with 
Ti and 
Pb beams, respectively. Precise measurements of 
branching ratios in the band confirm a clean 9/2
[734]
7/2
[624] for the isomer, validating the systematics of K
= 8 two-quasineutron isomers observed in even-
, 
= 150 isotones. These isomers around the deformed shell gap at = 152 provide critical benchmarks for theoretical predictions of single-particle energies in this gateway region to superheavy nuclei.
isomer in 
RfRobinson, A. P.*; Khoo, T. L.*; Seweryniak, D.*; Ahmad, I.*; Asai, Masato; Back, B. B.*; Carpenter, M. P.*; Chowdhury, P.*; Davids, C. N.*; Greene, J.*; et al.
Physical Review C, 83(6), p.064311_1 - 064311_7, 2011/06
Times Cited Count：32 Percentile：84.86(Physics, Nuclear)We have identified an isomer with a half-life of 17 
s in Rf through a calorimetric conversion electron measurement tagged with implanted Rf nuclei using the fragment mass analyzer at Argonne National Laboratory. The low population yield for this isomer suggests that this isomer should not be a 2-quasiparticle high- isomer which is typically observed in the N = 152 isotones, but should be a 4-quasiparticle one. Possible reasons of the non-observation of a 2-quasiparticle isomer are this isomer decays by fission with a half-life similar to that of the ground state of Rf. Another possibility, that there is no 2-quasiparticle isomer at all, would imply an abrupt termination of axially symmetric deformed shape at Z=104.
Seweryniak, D.*; Khoo, T. L.*; Ahmad, I.*; Kondev, F. G.*; Robinson, A.*; Tandel, S. K.*; Asai, Masato; Back, B. B.*; Carpenter, M. P.*; Chowdhury, P.*; et al.
Nuclear Physics A, 834(1-4), p.357c - 361c, 2010/03
Times Cited Count：7 Percentile：47.82(Physics, Nuclear)Experimental data on single-particle energies in nuclei around Z=100 and N=152 play an important role to test validity of theoretical predictions for shell structure of superheavy nuclei. We found high-K two-quasiparticle isomers in 
No and 
No, and evaluated energies of proton single-particle orbitals around Z=100. We also found a new high-K three quasiparticle isomer in 
Rf. Energies of neutron single-particle orbitals were also evaluated from experimental data of the 
decay of Rf. Comparisons between the present experimental data and various theoretical calculations for the proton single-particle orbitals indicate that the calculation by using the Woods-Saxon potential gives the best agreement with the data.
RfQian, J.*; Heinz, A.*; Khoo, T. L.*; Janssens, R. V. F.*; Peterson, D.*; Seweryniak, D.*; Ahmad, I.*; Asai, Masato; Back, B. B.*; Carpenter, M. P.*; et al.
Physical Review C, 79(6), p.064319_1 - 064319_13, 2009/06
Times Cited Count：31 Percentile：83.95(Physics, Nuclear)-, 
-, and conversion electron spectroscopy experiments for Rf have been performed using Fragment Mass Analyzer at Argonne National Laboratory. A new isomer with a half-life of 160 s has been discovered in Rf, and it is interpreted as a three-quasiparticle high- isomer. Neutron configurations of one-quasiparticle states in 
No, the -decay daughter of Rf, have been assigned on the basis of -decay hindrance factors. Excitation energies of the 1/2
[620] states in =151 isotones indicate that the deformed shell gap at =152 increases with the atomic number.
isomers and 
octupole vibrations in 
shell-stabilized isotonesRobinson, A. P.*; Khoo, T. L.*; Ahmad, I.*; Tandel, S. K.*; Kondev, F. G.*; Nakatsukasa, Takashi*; Seweryniak, D.*; Asai, Masato; Back, B. B.*; Carpenter, M. P.*; et al.
Physical Review C, 78(3), p.034308_1 - 034308_6, 2008/09
Times Cited Count：49 Percentile：90.87(Physics, Nuclear)Isomers have been identified in 
Cm and No with quantum number , which decay through rotational bands built on octupole vibrational states. For isotones with atomic number 
102, the and 2 states have remarkably stable energies, indicating neutron excitations. An exception is a singular minimum in the 2 energy at Cm, due to the additional role of proton configurations.
Ahmad, S.*; Kono, Hidetoshi; Ara
zo-Bravo, M. J.*; Sarai, Akinori*
Nucleic Acids Research, 34(Suppl.2), p.W124 - W127, 2006/07
Times Cited Count：31 Percentile：49.98(Biochemistry & Molecular Biology)no abstracts in English
Arazo-Bravo, M. J.*; Fujii, Satoshi*; Kono, Hidetoshi; Ahmad, S.*; Sarai, Akinori*
Journal of the American Chemical Society, 127(46), p.16074 - 16089, 2005/11
Times Cited Count：46 Percentile：73.02(Chemistry, Multidisciplinary)no abstracts in English
Kono, Hidetoshi; Kumar, S.*; Ahmad, S.*; Arazo-Bravo, M. J.*; Fujii, Satoshi*; Go, Nobuhiro; Sarai, Akinori*
no journal, ,
no abstracts in English
Sarai, Akinori*; Ueno, Takuya*; Ngahu, A.*; Ahmad, S.*; Kono, Hidetoshi
no journal, ,
no abstracts in English
Ngahu, A.*; Ueno, Takuya*; Ahmad, S.*; Kono, Hidetoshi; Sarai, Akinori*
no journal, ,
no abstracts in English
