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Recent results in fragmentation isomer spectroscopy with rising

GSI-FRSを用いた最近の核破砕アイソマー分光の実験結果

Pietri, S.*; Regan, P. H.*; Podoly$'a$k, Zs.*; Rudolph, D.*; Steer, S. J.*; Garnsworthy, A. B.*; Werner-Malento, E.*; Hoischen, R.*; G$'o$rska, M.*; Gerl, J.*; Wollersheim, H. J.*; Kojouharov, I.*; Schaffner, H.*; Becker, F.*; Bednarczyk, P.*; C$'a$ceres, L.*; Doornenbal, P.*; Geissel, H.*; Gr$c{e}$bosz, J.*; Kelic, A.*; Kurz, N.*; Montes, F.*; Prokopowicz, W.*; 斉藤 武彦*; Tashenov, S.*; Heinz, A.*; Pf$"u$tzner, M.*; Kurtukian-Nieto, T.*; Benzoni, G.*; Hellstr$"o$m, M.*; Jungclaus, A.*; Simpson, J.*; Andersson, L.-L.*; Atanasova, L.*; Balabanski, D. L.*; Bentley, M. A.*; Blank, B. B.*; Blazhev, A.*; Brandau, C.*; Brown, J. R.*; Bruce, A. M.*; Camera, F.*; Catford, W. N.*; Cullen, I. J.*; Dombr$'a$di, Zs.*; Estevez, E.*; Fahlander, C.*; Gelletly, W.*; Ilie, G.*; Johansson, E. K.*; Jolie, J.*; Jones, G. A.*; Kmiecik, M.*; Kondev, F. G.*; Lalkovski, S.*; Liu, Z.*; Maj, A.*; Myalski, S.*; 静間 俊行; Simons, A. J.*; Schwertel, S.*; Walker, P. M.*; Wieland, O.*

Pietri, S.*; Regan, P. H.*; Podoly$'a$k, Zs.*; Rudolph, D.*; Steer, S. J.*; Garnsworthy, A. B.*; Werner-Malento, E.*; Hoischen, R.*; G$'o$rska, M.*; Gerl, J.*; Wollersheim, H. J.*; Kojouharov, I.*; Schaffner, H.*; Becker, F.*; Bednarczyk, P.*; C$'a$ceres, L.*; Doornenbal, P.*; Geissel, H.*; Gr$c{e}$bosz, J.*; Kelic, A.*; Kurz, N.*; Montes, F.*; Prokopowicz, W.*; Saito, Takehiko*; Tashenov, S.*; Heinz, A.*; Pf$"u$tzner, M.*; Kurtukian-Nieto, T.*; Benzoni, G.*; Hellstr$"o$m, M.*; Jungclaus, A.*; Simpson, J.*; Andersson, L.-L.*; Atanasova, L.*; Balabanski, D. L.*; Bentley, M. A.*; Blank, B. B.*; Blazhev, A.*; Brandau, C.*; Brown, J. R.*; Bruce, A. M.*; Camera, F.*; Catford, W. N.*; Cullen, I. J.*; Dombr$'a$di, Zs.*; Estevez, E.*; Fahlander, C.*; Gelletly, W.*; Ilie, G.*; Johansson, E. K.*; Jolie, J.*; Jones, G. A.*; Kmiecik, M.*; Kondev, F. G.*; Lalkovski, S.*; Liu, Z.*; Maj, A.*; Myalski, S.*; Shizuma, Toshiyuki; Simons, A. J.*; Schwertel, S.*; Walker, P. M.*; Wieland, O.*

ドイツGSIにおけるRISING実験の最初の結果について報告する。本実験では、核子あたり1GeVの高エネルギーイオンによる核破砕反応を用いてベータ安定線から遠く離れた不安定核を生成する。105台の独立な結晶から成るRising静止ビームの$$gamma$$線分光器を用いて、ナノ秒からミリ秒の半減期を持つアイソマーからの崩壊$$gamma$$線の測定を行う。本稿では、Rising実験の目的、測定器、最初の実験結果、及び将来計画について紹介する。

The first results from the stopped beam RISING experimental campaign performed at the GSI laboratory in Darmstadt, Germany, are presented. RISING constitutes a major new experimental program in European nuclear structure physics research aimed at using relativistic energy (typically around 1 GeV per nucleon) projectile fragmentation reactions to populate nuclei with highly exotic proton-to-neutron ratios compared to the line of beta stability. In its high-efficiency stopped beam configuration, the RISING $$gamma$$-ray spectrometer consists of 105 individual germanium crystals which view a focal plane in which the exotic nuclei are brought to rest. Here, decays from metastable states with half-lives in the nano to milliseconds range can be observed. Results of initial commissioning experiments are also shown and details of the planned future experimental program are given.

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