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-decay branching ratio of 
PtCubiss, J. G.*; Harding, R. D.*; Andreyev, A. N.; Althubiti, N.*; Andel, B.*; Antalic, S.*; Barzakh, A. E.*; Cocolios, T. E.*; Day Goodacre, T.*; Farooq-Smith, G. J.*; et al.
Physical Review C, 101(1), p.014314_1 - 014314_4, 2020/01
Times Cited Count：5 Percentile：45.47(Physics, Nuclear)The -decay branching ratio of 0.52(5)% from the ground state of Pt to the ground state of the daughter nucleus 
Os has been determined more precisely than before. The Pt was produced as the 
-decay granddaughter of Hg which was produced and separated with the CERN-ISOLDE facility. The reduced -decay width calculated with the present result has provided a new picture of the systematics for the -decay width of neutron-deficient Pt isotopes.
decay of 
USun, M. D.*; Liu, Z.*; Huang, T. H.*; Zhang, W. Q.*; Andreyev, A. N.; Ding, B.*; Wang, J. G.*; Liu, X. Y.*; Lu, H. Y.*; Hou, D. S.*; et al.
Physics Letters B, 800, p.135096_1 - 135096_5, 2020/01
Times Cited Count：12 Percentile：74.96(Astronomy & Astrophysics) decay of 
AtCubiss, J. G.*; Andreyev, A. N.; Barzakh, A. E.*; Andel, B.*; Antalic, S.*; Cocolios, T. E.*; Day Goodacre, T.*; Fedorov, D. V.*; Fedosseev, V. N.*; Ferrer, R.*; et al.
Physical Review C, 99(6), p.064317_1 - 064317_6, 2019/06
Times Cited Count：6 Percentile：48.12(Physics, Nuclear)An decay of At was studied at the CERN-ISOLDE facility using a laser-ionization technique. Coincidence -
data were collected for the first time and a more precise half-life value of T
= 1.27(6) s was measured. A new -decay scheme was deduced based on the fine-structure of the decay. The results lead to a preferred spin and parity assignment of J
= (3
) for the ground state of At; however, J = (2) cannot be fully excluded.
Van Duppen, P.*; Andreyev, A. N.
The Euroschool of Exotic Beams, Vol.5, p.65 - 116, 2018/04
-fission and recoil---fission events observed in the reaction 
Ca + 
AmForsberg, U.*; Rudolph, D.*; Andersson, L.-L.*; Di Nitto, A.*; D
llmann, Ch. E.*; Fahlander, C.*; Gates, J. M.*; Golubev, P.*; Gregorich, K. E.*; Gross, C. J.*; et al.
Nuclear Physics A, 953, p.117 - 138, 2016/09
Times Cited Count：53 Percentile：95.13(Physics, Nuclear)Alpha-decay chains observed in the element-115 production reactions of Ca + Am were investigated using a new data set consisting of our recently reported data obtained at GSI and previously reported ones at Dubna and LBNL. Short decay chains of recoil--()-fission type, fourteen of which were observed, and some of which were interpreted as the 2-neutron evaporation products 
Mc, have been reassigned. It is plausible that most of them were assigned to the 3-neutron evaporation products 
Mc whose decay chain would on the way have branches of EC decays followed by fission.
-decay study of 
TlVan Beveren, C.*; Andreyev, A. N.; Barzakh, A. E.*; Cocolios, T. E.*; de Groote, R. P.*; Fedorov, D.*; Fedosseev, V. N.*; Ferrer, R.*; Ghys, L.*; Huyse, M.*; et al.
Journal of Physics G; Nuclear and Particle Physics, 43(2), p.025102_1 - 025102_22, 2016/02
Times Cited Count：11 Percentile：60.63(Physics, Nuclear)
from alpha spectroscopyAsai, Masato; He
berger, F. P.*; Lopez-Martens, A.*
Nuclear Physics A, 944, p.308 - 332, 2015/12
Times Cited Count：59 Percentile：95.54(Physics, Nuclear)Nuclear structure of Z = 100-109 nuclei studied through -decay spectroscopy have been reviewed. Experimental techniques and methods concerning separation techniques, summing effects in spectra, and the use of digital electronics for -decay spectroscopy have been described in detail. The presentation of the experimental results and the physics discussion were focused on nuclear structure systematics in even-Z nuclei along the N = 151, 153, and 155 isotonic lines, where most progress has been achieved in the last 10 years.
decays of 
AmAsai, Masato; Sakama, Minoru*; Tsukada, Kazuaki; Ichikawa, Shinichi; Haba, Hiromitsu*; Nishinaka, Ichiro; Nagame, Yuichiro; Goto, Shinichi*; Kojima, Yasuaki*; Oura, Yasuji*; et al.
European Physical Journal A, 22(3), p.411 - 416, 2004/12
Times Cited Count：9 Percentile：50.77(Physics, Nuclear)EC and decays of Am have been studied by means of -ray spectroscopy. Excited states in Pu have been established for the first time, and tentative spin-parity and Nilsson assignments were given to these levels. The ground state of Am was evaluated to be the ![$$pi 5/2^{-}[523]$$](/search/images/EROHA0JAGUXTEXT1FV4VWNJSGNOSI.gif)
state from the experimental results. It was found that the state in 
Np is located at 
15~keV, which allowed us to determine the 
value of Am as 6569
~keV, in combination with the measured -particle energy.
decays of neutron-deficient transuranium isotopesAsai, Masato; Sakama, Minoru; Tsukada, Kazuaki; Ichikawa, Shinichi; Haba, Hiromitsu; Nishinaka, Ichiro; Nagame, Yuichiro; Goto, Shinichi; Kojima, Yasuaki*; Oura, Yasuji*; et al.
Journal of Nuclear Science and Technology, 39(Suppl.2), p.474 - 477, 2002/08
Neutron-deficient americium and curium isotopes with half-lives 
10 min have been produced with the tandem accelerator, and their EC and weak decays have been successfully measured through an on-line isotope separation. Decay schemes of 
Am have been established, and proton-neutron configurations in the parent and daughter nuclei have been determined. Observed transitions in 
Am were found to be the favored transitions between the Nilsson states. Information on nuclear structure, deformation, and atomic masses in this region were obtained.
Asai, Masato; Sakama, Minoru*; Tsukada, Kazuaki; Ichikawa, Shinichi; Haba, Hiromitsu; Nishinaka, Ichiro; Nagame, Yuichiro; Goto, Shinichi*; Akiyama, Kazuhiko; Toyoshima, Atsushi; et al.
Journal of Nuclear and Radiochemical Sciences, 3(1), p.187 - 190, 2002/06
EC and decays of neutron-deficient americium, curium, and berkelium nuclei have been studied using the JAERI on-line isotope separator. Decay schemes of 
Am have been established for the first time, and proton-neutron configurations in Am and Pu have been determined. transitions observed in 
Am were found to be the favored transitions between the Nilsson states. values of 
Cm have been determined. Nuclear structure, deformation, and atomic masses for these nuclei were discussed.
Mitsuoka, Shinichi; Ikezoe, Hiroshi; Ikuta, T.*; Hamada, Shingo; Nagame, Yuichiro; Tsukada, Kazuaki; Nishinaka, Ichiro; Otsuki, Tsutomu*
Journal of Radioanalytical and Nuclear Chemistry, 239(1), p.155 - 157, 1999/00
Times Cited Count：0 Percentile：0.00(Chemistry, Analytical)no abstracts in English
Maruyama, Yu; ; Moriyama, Kiyofumi; H.S.Park*; Kudo, Tamotsu; Y.Yang*; Sugimoto, Jun
JAERI-Conf 98-009, p.100 - 106, 1998/00
no abstracts in English
-decay properties of the new neutron deficient isotope 
PaMitsuoka, Shinichi; Ikezoe, Hiroshi; ; Nagame, Yuichiro; Tsukada, Kazuaki; Nishinaka, Ichiro; Oura, Yasutsugu*
Physical Review C, 55(3), p.1555 - 1558, 1997/03
Times Cited Count：28 Percentile：79.79(Physics, Nuclear)no abstracts in English
decay of a new isotope 
ThIkezoe, Hiroshi; ; Hamada, S.; Nagame, Yuichiro; Nishinaka, Ichiro; Tsukada, Kazuaki; Oura, Yasutsugu*
Physical Review C, 54(4), p.2043 - 2046, 1996/10
Times Cited Count：21 Percentile：72.65(Physics, Nuclear)no abstracts in English
Sekine, Toshiaki
Dai-4-Pan Jikken Kagaku Kouza, 14; Kaku, Hoshasen, p.83 - 111, 1992/00
no abstracts in English
; ; ;
JAERI-M 9911, 32 Pages, 1982/02
no abstracts in English
Harada, Kichinosuke; Rauscher, E. A.*
Phys.Rev., 169(4), p.818 - 824, 1968/00
Times Cited Count：57no abstracts in English
-decay spectroscopy of superheavy nucleiAsai, Masato
no journal, ,
To investigate nuclear structure of superheavy nuclei experimentally, spectroscopic methods which can reveal level structure of ground- and excited states are the most effective. In particular, fine-structure -decay spectroscopy is expected to be a very sensitive method because spectroscopic information can be obtained only through -particle measurements. However, it is difficult to measure particles of superheavy nuclei with high energy resolution. Moreover, the observed energy spectra are significantly distorted by coincidence summing effects. I would like to demonstrate how we can overcome these difficulties, and how useful the fine-structure -decay spectroscopy is to investigate nuclear structure of superheavy nuclei.
RfAsai, Masato; Tsukada, Kazuaki; Sato, Nozomi*; Sato, Tetsuya; Toyoshima, Atsushi; Ishii, Tetsuro; Miyashita, Sunao*; Kaneya, Yusuke*; Shima, Yosuke*; Shibata, Michihiro*
no journal, ,
We have obtained new experimental data for nuclear structure of Rf through -decay spectroscopy. We have reconfirmed existence of two transitions in the decay of Rf through - coincidence measurement, and determined the -transition energy very precisely through high-resolution -fine structure measurement. On the basis of these experimental results, we have estimated spin-parities and neutron single-particle configurations of the ground- and isomeric states of Rf, and have obtained information on the single-particle configurations and nuclear deformations for heavier superheavy nuclei.
RfAsai, Masato; Tsukada, Kazuaki; Sato, Nozomi*; Sato, Tetsuya; Toyoshima, Atsushi; Ishii, Tetsuro; Miyashita, Sunao*; Kaneya, Yusuke; Shima, Yosuke*; Shibata, Michihiro*
no journal, ,
Alpha-gamma coincidence and high-resolution fine-structure measurements were performed for the decay of Rf. Two lines associated with the decay of Rf were clearly observed, and more precise -energy spectrum than before were obtained. It was found that the literature value (8.28 MeV) of the -transition energy of Rf was incorrect, and that the -decay scheme of Rf should contain several low-energy cascade transitions. On the basis of these results and literature data of 
Rf, we will discuss nuclear structure of superheavy nuclei around this region as well as the level structure of Rf and its daughter nucleus 
No.
-decay spectroscopy for RfAsai, Masato; Tsukada, Kazuaki; Sato, Nozomi*; Sato, Tetsuya; Toyoshima, Atsushi; Ishii, Tetsuro; Miyashita, Sunao*; Kaneya, Yusuke*; Shibata, Michihiro*; Shima, Yosuke*
no journal, ,
We have performed - coincidence and high-resolution -fine structure spectroscopy for Rf, and have obtained new information on nuclear structure of Rf. We have confirmed the existence of two transitions following the decay, and have succeeded in determining the -transition energy very accurately. On the basis of these experimental results, we have estimated the spin-parities and neutron single-particle configurations of the ground- and isomeric states of Rf, and have obtained information on the single-particle configurations and nuclear deformations for heavier superheavy nuclei.
