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Benchmarking the PreSPEC@GSI experiment for Coulex-multipolarimetry on the $$\pi (p_{3/2})\rightarrow \pi (p_{1/2})$$π(p3/2)→π(p1/2) spin-flip transition in $$^{85}\hbox {Br}$$85Br
The European Physical Journal A ( IF 2.7 ) Pub Date : 2020-05-25 , DOI: 10.1140/epja/s10050-020-00148-2
P. Napiralla , M. Lettmann , C. Stahl , G. Rainovski , N. Pietralla , S. Afara , F. Ameil , T. Arici , S. Aydin , D. Barrientos , P. Bednarczyk , M. A. Bentley , G. Benzoni , B. Birkenbach , A. Blazhev , A. J. Boston , P. Boutachkov , A. Bracco , B. Bruyneel , E. Clément , M. L. Cortés , F. C. L. Crespi , D. M. Cullen , D. Curien , P. Désesquelles , F. Didierjean , C. Domingo-Pardo , G. Duchêne , J. Eberth , H. Egger , C. Fahlander , J. Gerl , K. A. Gladnishki , P. Golubev , V. González , M. Górska , A. Gottardo , L. Grassi , T. Habermann , L. J. Harkness-Brennan , H. Hess , D. G. Jenkins , P. R. John , J. Jolie , D. S. Judson , I. Kojouharov , W. Korten , M. Labiche , N. Lalović , C. Lizarazo , C. Louchart-Henning , A. Maj , R. Menegazzo , D. Mengoni , E. Merchan , B. Million , O. Möller , T. Möller , K. Moschner , V. Modamio , D. Napoli , B. S. Nara Singh , Zs. Podolyák , S. Pietri , D. Ralet , M. Reese , P. Reiter , D. Rudolph , E. Sanchis , L. G. Sarmiento , H. Schaffner , J. Simpson , P. P. Singh , J. J. Valiente-Dobón , V. Werner , O. Wieland

A first performance test of the Coulomb excitation multipolarimetry (Coulex-multipolarimetry) method is presented. It is based on a \(^{85}\hbox {Br}\,\pi p_{3/2}\rightarrow \pi p_{1/2}\) spin-flip experiment performed as part of the PreSPEC-AGATA campaign at the GSI Helmholtzzentrum für Schwerionenforschung (GSI). Via determination of background levels around the expected \(^{85}\hbox {Br}\) excitations as well as measured \(^{197}\hbox {Au}\) excitations, an upper limit for the M1 transition strength of the \(1/2_1^-\rightarrow 3/2_\text {g.s.}^-\) transition in \(^{85}\hbox {Br}\) and a lower beam time limit for upcoming experimental campaigns utilizing Coulex-multipolarimetry have been inferred. The impact of the use of AGATA in its anticipated \(1\pi \) configuration on these estimates is deduced via Geant4 simulations.

中文翻译:

在$$ \ pi(p_ {3/2})\ rightarrow \ pi(p_ {1/2})$$π(p3 / 2)→π(p1 / 2)上对PreSPEC @ GSI实验进行库仑多极化测试)$$ ^ {85} \ hbox {Br} $$ 85Br中的旋转翻转转换

提出了库仑激发多极化法(Coulex-multipolarimetry)方法的首次性能测试。它基于作为PreSPEC-AGATA一部分执行的\(^ {85} \ hbox {Br} \,\ pi p_ {3/2} \ rightarrow \ pi p_ {1/2} \)自旋翻转实验GSI HelmholtzzentrumfürSchwerionenforschung(GSI)的广告系列。通过确定预期\(^ {85} \ hbox {Br} \)激发以及测得的\(^ {197} \ hbox {Au} \)激发附近的背景水平,M 1跃迁强度的上限所述的\(1 / 2_1 ^ - \ RIGHTARROW 3 / 2_ \文本{GS} ^ - \)在过渡\(^ {85} \ {hbox中溴} \)和用于利用即将到来的广告活动的实验下梁时限Coulex-多极化测定法已经被推断出来。通过Geant4仿真推论出在其预期\(1 \ pi \)配置中使用AGATA对这些估计的影响。
更新日期:2020-05-25
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