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First Observation Of Two‐Proton Radioactivity Of45Fe

 

作者: B. Blank,   M. Pfu¨tzner,   J. Giovinazzo,   E. Badura,   C. Bingham,   C. Borcea,   B. A. Brown,   M. Chartier,   S. Czajkowski,   F. de Oliveira Santos,   A. Fleury,   H. Geissel,   L. V. Grigorenko,   R. Grzywacz,   M. Hellstro¨m,   Z. Janas,   J. Kurcewicz,   A. S. Lalleman,   M. Lewitowicz,   M. J. Lopez Jimenez,   V. Maslov,   C. Mazzocchi,   I. Mukha,   G. Mu¨nzenberg,   C. Plettner,   M. S. Pravikoff,   E. Roeckl,   K. P. Rykaczewski,   K. Schmidt,   R. S. Simon,   M. Stanoiu,   J.‐C. Thomas,  

 

期刊: AIP Conference Proceedings  （AIP Available online 1903）
卷期: Volume 656, issue 1  

页码: 83-90

 

ISSN:0094-243X

 

年代: 1903

 

DOI:10.1063/1.1556627

 

出版商: AIP

 

数据来源: AIP

 

摘要:

In experiments at the FRS of GSI and at the SISSI‐LISE3 facility of GANIL, the decay of the proton drip‐line nucleus45Fe has been studied after projectile fragmentation of a58Ni primary beam. Fragment‐implantation events have been correlated with radioactive decay events in silicon telescopes on an event‐by‐event basis. The decay‐energy spectrum of45Fe implants shows a distinct peak consistent with a two‐proton ground‐state decay of45Fe. None of the events in the peak were found to be in coincidence with &ggr; radiation or with &bgr; particles which were searched for in the telescope‐surrounding detectors. The decay energy for45Fe agrees nicely with several theoretical predictions for two‐proton emission. These predictions strongly support the observed decay to be a simultaneous two‐proton ground‐state decay. © 2003 American Institute of Physics

 

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