The Orsay Universal Plunger System

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• 作者：J. Ljungvall^a ; ^{joa.ljungvall@csnsm.in2p3.fr} ; G. Georgiev^a ; S. Cabaret^a ; N. Karkour^a ; D. Linget^a ; G. Sedes^a ; R. Chevrier^b ; I. Matea^c ; M. Niikura^c ; M.-D. Salsac^d ; B. Sulignano^d
• 关键词：In-beam ¦Ã-ray spectroscopy ; Recoil-Distance Doppler Shift ; Lifetimes
• 刊名：Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
• 出版年：2012
• 出版时间：1 July, 2012
• 年：2012
• 卷：679
• 期：Complete
• 页码：61-66
• 全文大小：776 K

文摘

A new plunger device for Recoil-Distance Doppler Shift and Time-Differential Recoil-In-Vacuum measurements has been developed at the CSNSM in collaboration with the IPN Orsay. It is conceived to be easily adapted to different experimental setups and facilities, in particular to the future radioactive beam facility Spiral2. An electronic feedback system keeping the distance between target and stopper foils constant, imperative for precision measurements of short lifetimes, was also developed.

The plunger device was commissioned with an experiment performed at the IPN Orsay Tandem accelerator laboratory using the Orgam germanium detector array. Excited states in ⁷⁶Kr were populated using the reaction ⁴⁵Sc(³⁵Cl,2p2n)⁷⁶Kr. The lifetime of the state was determined to 4.3(6) ps, in accordance with previous measurement, confirming the functionality of the new plunger device. The commissioning experiment showed in particular that the electronic feed back system works as foreseen.