New recoil transfer chamber for thermalization of heavy ions produced in fusion-evaporation reactions

作者：Alfonso M C; Tereshatov E E; DeVanzo M J; Sefcik J A; Bennett M E; Mayorov D A; Werke T A; Folden C M III^*

来源：Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment , 2015, 798: 52-61.

DOI：10.1010/j.nima.2015.07.004

• Recoil transfer chamber
• Gas stopper
• Gas catcher
• Heavy elements
• Fusion-evaporation reactions

A new Recoil Transfer Chamber (RTC) has been designed, fabricated, and characterized at the Cyclotron Institute at Texas A&M University. The design is based on a gas stopper that was previously in routine use at the National Superconducting Cyclotron Laboratory. This new RTC uses He gas to stop ions, and a combination of a static electric field and gas flow to maximize the extraction efficiency. In offline experiments, a Th-228 source was used to produce Po-216 which was successfully extracted even though it has a short half-life. In online experiments using the products of the Sn-118(Ar-40, 6n)Er-152 reaction, an efficiency of several tens of percent was measured.

• 出版日期2015-10-21