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Am and its EC-decay daughter 
PuAsai, 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, 23(3), p.395 - 400, 2005/02
Times Cited Count：16 Percentile：70.02(Physics, Nuclear)The EC decay of Am has been studied through 
-ray spectroscopy. Two EC-decaying states have been found in Am with half-lives of 3.6 min and 2.9 min. In Pu, we have found the 
octupole band and two-quasiparticle states one of which is a 
isomer with a 1.2 
s half-life. The EC transitions from Am to the two-quasiparticle states in Pu show small 
values of 4.8--5.3, which allowed us to assign proton-neutron configurations of Am and the two-quasiparticle states.
Yamauchi, Toshihiko; Hayakawa, Takehito; Shizuma, Toshiyuki
JAERI-Conf 2002-007, 54 Pages, 2002/08
JAERI-Conf-2002-007.pdf:5.32MB
The workshop on application of free-electron laser (FEL) and nuclear isomer study was held at Tokai Research Establishment of JAERI on September 28. The workshop was devoted to the discussions and the presentations of two thema as follows: Six papers associated with the laser compton gamma-ray, the photonuclear physics and the nuclear astrophysics using the gannma-ray produced by the T3 laser were presented in the morning session. Seven papers including an invited talk on the behavior of molecules in intense laser light fields and associated with the chemical decomposition of dioxin, the silicon isotope separetion, the infrared photoexcitation spectroscopy, the laser-tissue interaction and the single-wall carbon nanotube and nanohorn by FEL etc. were also presented in the afternoon session. The intensive discussion was exchanged among approximately 50 participants. Each performance during the first workshop was fully telecomunicated by a video conference system between Tokai and Kizu (Kansai Research Establishment) sites.
Tabata, Yoneho*; Oshima, Akihiro
Macromolecular Symposia, 143, p.337 - 358, 1999/08
Times Cited Count：35 Percentile：75.84(Polymer Science)no abstracts in English
AmShinohara, Nobuo; ; ; Kono, Nobuaki
Journal of Nuclear Science and Technology, 34(7), p.613 - 621, 1997/07
Times Cited Count：32 Percentile：89.00(Nuclear Science & Technology)no abstracts in English
Cs(n,)
CsSekine, Toshiaki; ; Kobayashi, Katsutoshi; Harada, Hideo*; Watanabe, Hisashi*; Kato, Toshio*
Proc. of the Nuclear Data for Science and Technology, p.57 - 58, 1992/00
no abstracts in English
Nb;
Journal of Inorganic and Nuclear Chemistry, 40(12), p.1973 - 1976, 1978/00
Times Cited Count：1no abstracts in English
Pu fission isomer in the reaction with 3-5Mev neutrons;
Journal of the Physical Society of Japan, 42(5), p.1773 - 1774, 1977/05
Times Cited Count：0
Np isomerAsai, Masato; Suekawa, Yoshihide*; Higashi, Masato*; Kamada, Hiroki*; Tobe, Teruhisa*; Andreyev, A. N.; Hirose, Kentaro; Ito, Yuta; Makii, Hiroyuki; Nishio, Katsuhisa; et al.
no journal, ,
We have carried out experiments to study nuclear structure of the new isomer 
Np which we discovered recently. The Np was produced in the reaction of 
U target with 
Li beam at JAEA tandem accelerator, and was mass-separated with an on-line isotope separator (ISOL). The half-life was determined accurately through LX-ray measurements. The transition emitted by following the isomeric transition was successfully observed through LX- coincidence measurements. Moreover, the multipolarities of the transitions were determined with internal-conversion electron measurements. On the basis of these experimental results, We have clarified excitation energy, spin-parity, and nuclear structure of Np.
Np isomer and its decay propertiesAsai, Masato; Suekawa, Yoshihide*; Higashi, Masato*; Kamada, Hiroki*; Tobe, Teruhisa*; Andreyev, A. N.; Hirose, Kentaro; Ito, Yuta; Makii, Hiroyuki; Nishio, Katsuhisa; et al.
no journal, ,
A new isomer Np with a half-life of 
9 min has been discovered. It was produced in the reaction of U target with Li beam at JAEA tandem accelerator, and was identified through characteristic X-ray measurement and mass separation with an on-line isotope separator (ISOL). Gamma-ray singles, gamma-gamma coincidence, and internal-conversion electron measurements were performed. It was revealed that the Np decays mostly through an isomeric E4 transition followed by an M1 transition, and that the spin-parity of the Np should be 5
. The results are introduced in detail, and the nuclear structure of the Np are discussed.
