Separated flow operation of the SHARAQ spectrometer for in-flight proton decay experiments
Separated flow operation of the SHARAQ spectrometer for in-flight proton decay experiments
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用于飞行质子衰变实验的 SHARAQ 谱仪的分流操作
DOI：
10.1016/j.nima.2016.05.084
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发表时间：
2016
期刊：
影响因子：
--
通讯作者：
S. Shimoura
中科院分区：
文献类型：
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作者：
M. Dozono;T. Uesaka;S. Michimasa;M. Takaki;M. Kobayashi;M. Matsushita;S. Ota;H. Tokieda;S. Shimoura
本文提出了一种新的用于SHARAQ谱仪质子衰变实验的“分流”工作模式。在这种模式下，质子和重离子产物被分离，并在SHARAQ的两个不同焦平面上同时测量。使用246 MeV的质子束研究了新模式的离子光学性质，并从SHARAQ焦平面中测量的参数重建了动量矢量。在能量为247 MeV/u的（16 O，16 F）反应实验中，测量了16 F衰变产生的15 O + p输出，与SHARAQ符合。相对能量为535 keV，16 F动能为3940 MeV时，能量分辨率分别达到100 keV（FWHM）和102 MeV。该模式允许一种新形式的失踪质谱使用的反应探针与粒子衰变通道。
A new “separated flow” operating mode has been developed for in-flight proton-decay experiments using the SHARAQ spectrometer. In this mode, the protons and heavy-ion products are separated and measured in coincidence at two different focal planes of the SHARAQ. The ion-optical properties of the new mode were studied using a proton beam at 246 MeV, and the momentum vector was reconstructed from the parameters measured in the focal plane of the SHARAQ. In the experiment with the (16O,16F) reaction at a beam energy of 247 MeV/u, the outgoing15O+pproduced by the decay of16F were measured in coincidence with the SHARAQ. High energy resolutions of 100 keV (FWHM) and ∼2 MeV were achieved for a relative energy of 535 keV and a16F kinetic energy of 3940 MeV, respectively. The mode allows a new form of missing-mass spectroscopy using a reaction probe with a particle-decay channel.