A high performance Time-of-Flight detector applied to isochronous mass measurement at CSRe

Mei, B.; Xiao-Lin, Tu; Wang, M.; Xu, H. S.; Mao, Ruishi; Hu, Zhengguo; Ma, Xueli; Yuan, Y.J.; Zhang, Xueying; Geng, Peng; Peng, Shuai; Zang, Yunxiang; Tang, S.W.; Ma, P.; Lu, W.; Yan, Xin-Shuai; Xia, J.W.; Xiao, Guoqing; Guo, Zhimou; Zhang, Hongbin; Yue, K.

doi:10.1016/j.nima.2010.09.001

Cited by 78 publications

(49 citation statements)

References 21 publications

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“…The revolution times of the stored ions were measured using a timing detector [35] installed inside the ring aperture. Each time an ion passed through the carbon foil of the detector, a timing signal was generated and recorded by a fast digital oscilloscope.…”

Section: Experiments and Resultsmentioning

confidence: 99%

Masses of 52Co And their Impact On The Understanding Of Beta-decay Of 52Ni

Zhang¹

2017

Proceedings of the 26th International Nuclear Physics Conference — PoS(INPC2016)

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Mass excesses of 52 Co and its (2 + ) isomer are measured to be −34361(8) keV and −33974(10) keV using isochronous mass spectrometry at CSRe. Referring to the β -delayed γ emissions of 52 Ni, we identified a new excited state in 52 Co and assigned it as the T = 2, J π = 0 + isobaric analog state (IAS) of 52 Ni. This state is 135(17) keV less bound than that suggested previously based on the β -delayed protons of 52 Ni. We find that the mass of this IAS together with those of the IAS ′ s in 52 Fe, 52 Mn, and 52 Cr fit well into the Isobaric Multiplet Mass Equation.An interesting finding from this measurement is that the IAS in 52 Co decays dominantly via γ transitions while proton emission is almost negligible. This phenomenon could be due to very low isospin mixing according to the large-scale shell model calculations.

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Section: Experiments and Resultsmentioning

confidence: 99%

Masses of 52Co And their Impact On The Understanding Of Beta-decay Of 52Ni

Zhang¹

2017

Proceedings of the 26th International Nuclear Physics Conference — PoS(INPC2016)

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“…The first measurement with highly charged states was recently performed at TITAN on a neutrondeficient 74 Rb isotope (T 1/2 = 65 ms) [38], where Rb isotopes were successfully charge-bred in an electron beam ion trap to q = 8 − 12…”

Section: The Achievable Relative Precision Of Pmts With the Tof-icr Tmentioning

confidence: 99%

“…Because no cooling is required, IMS is suitable for accessing nuclei with lifetimes as short as a few tens of microseconds. The mass of nuclides of interest can be determined by directly measuring the flight time of the ions in the ring with a dedicated time-pickup detector, an MCP-based secondary electron emission detector [73][74][75][76]. Currently, IMS has been developed for the ESR (GSI) and CSRe (IMP).…”

Section: The Achievable Relative Precision Of Pmts With the Tof-icr Tmentioning

confidence: 99%

Toward precision mass measurements of neutron-rich nuclei relevant to r-process nucleosynthesis

et al. 2015

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The open question of where, when, and how the heavy elements beyond iron enrich our Universe has triggered a new era in nuclear physics studies. Of all the relevant nuclear physics inputs, the mass of very neutron-rich nuclides is a key quantity for revealing the origin of heavy elements beyond iron. Although the precise determination of this property is a great challenge, enormous progress has been made in recent decades, and it has contributed significantly to both nuclear structure and astrophysical nucleosynthesis studies. In this review, we first survey our present knowledge of the nuclear mass surface, emphasizing the importance of nuclear mass precision in r-process calculations. We then discuss recent progress in various methods of nuclear mass measurement with a few selected examples. For each method, we focus on recent breakthroughs and discuss possible ways of improving the weighing of r-process nuclides.

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“…The revolution times were measured using a timing detector [8] equipped with a 19 μg/cm 2 thin carbon foil of 40 mm in diameter. Each stored ion passed through the timing detector at every revolution in CSRe.…”

Section: Procedures Of Experimentsmentioning

confidence: 99%

Mass Measurement of Short-lived Nuclei at HIRFL-CSR

Wang

Zhang

et al. 2014

EPJ Web of Conferences

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Abstract. Four campaigns of mass measurements for short-lived nuclei have been conducted using an isochronous mass spectrometry (IMS) technique at HIRFL-CSR (Cooler Storage Ring) in Lanzhou. The radioactive nuclei were produced by projectile fragmentation and injected into the experimental storage ring CSRe. Revolution times of the ions stored in the CSRe were measured from which masses of 78 Kr, 58 Ni, 86 Kr and 112 Sn fragments have been determined with a relative uncertainty of about 10 -6 -10 -7 . The experimental results are presented and their impacts on nucleosynthesis in the rp process and nuclear structure are discussed.

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A high performance Time-of-Flight detector applied to isochronous mass measurement at CSRe

Cited by 78 publications

References 21 publications

Masses of 52Co And their Impact On The Understanding Of Beta-decay Of 52Ni

Masses of 52Co And their Impact On The Understanding Of Beta-decay Of 52Ni

Toward precision mass measurements of neutron-rich nuclei relevant to r-process nucleosynthesis

Mass Measurement of Short-lived Nuclei at HIRFL-CSR

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