New Isotopes and Proton Emitters–Crossing the Drip Line in the Vicinity of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi>Sn</mml:mi></mml:mrow><mml:mprescripts /><mml:none /><mml:mrow><mml:mn>100</mml:mn></mml:mrow></mml:mmultiscripts></mml:mrow></mml:math>

Čeliković, I.; Lewitowicz, M.; Gernhäuser, R.; Krücken, R.; Nishimura, S.; Sakuraï, H.; Ahn, D. S.; Baba, H.; Blank, Β.; Blazhev, A.; Boutachkov, P.; Browne, F.; Doornenbal, P.; Fang, Y.; Fukuda, N.; Giovinazzo, J.; Goel, N.; Górska, M.; Ilieva, S.; Inabe, N.; Isobe, T.; Jungclaus, A.; Kameda, D.; Kim, Y. K.; Kwon, Y. K.; Kojouharov, I.; Kubo, T.; Kurz, N.; Lorusso, G.; Lubos, D.; Moschner, K.; Murai, D.; Nishizuka, I.; Park, J.; Patel, Z.; Rajabali, Mustafa; Rice, S.; Schaffner, H.; Shimizu, Y.; Sinclair, L.; Söderström, P.-A.; Steiger, Katja; Sumikama, T.; Suzuki, Hiroshi; Takeda, Hiroyuki; Wang, Z.; Watanabe, H.; Wu, J.; Xu, Z. Y.

doi:10.1103/physrevlett.116.162501

Cited by 38 publications

(28 citation statements)

References 33 publications

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“…Approximately 2500 100 Sn nuclei were produced, increasing the available world data by a factor of ∼10. The same holds for the even more exotic nuclei along the N ¼ Z − 1 line as well as the newly identified N ¼ Z − 2 nuclei 96 In, 94 Cd, 92 Ag, and 90 Pd [13,14].…”

supporting

confidence: 63%

Improved Value for the Gamow-Teller Strength of the Sn100 Beta Decay

Lubos¹,

Park²,

Faestermann³

et al. 2019

Phys. Rev. Lett.

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A record number of 100 Sn nuclei was detected and new isotopic species toward the proton dripline were discovered at the RIKEN Nishina Center. Decay spectroscopy was performed with the high-efficiency detector arrays WAS3ABi and EURICA. Both the half-life and the β-decay end point energy of 100 Sn were measured more precisely than the literature values. The value and the uncertainty of the resulting strength for the pure 0 þ → 1 þ Gamow-Teller decay was improved to B GT ¼ 4.4 þ0.9 −0.7 . A discrimination between different model calculations was possible for the first time, and the level scheme of 100 In is investigated further.Sn and its neighboring nuclei comprise a unique testing ground for modern large scale shell model (LSSM) calculations with realistic nuclear interactions. 100 Sn is the heaviest doubly magic N ¼ Z nucleus that is particle stable and decays via a pure and very fast Gamow-Teller (GT) β decay. The 100 Sn region is located in the nuclear chart close to the end of the astrophysical rapid proton capture process path. Thus, it is of particular interest concerning fundamental challenges in both nuclear physics and astrophysics [1].According to the extreme single particle model (ESPM) [2], 100 Sn decays via a pure GT transition of a proton (π) from the completely filled π0g 9=2 orbital into a neutron (ν) in the empty spin-orbit partner, the ν0g 7=2 orbital of 100 In. The ESPM GT strength is predicted to be B GT ¼ 17.78 [1]. However, the experimental values obtained up to now are smaller: 9.1 þ3.0 −2.6 [3] and 5.8 þ5.5 −3.2 [4,5]. These experiments [3,5,6] revealed the smallest log(ft) value-even smaller than the values of nuclei which decay by a Superallowed Fermi decay-throughout the nuclear chart. However, the PHYSICAL REVIEW LETTERS 122, 222502 (2019) 0031-9007=19=122 (22)=222502(6) 222502-1

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supporting

confidence: 63%

Improved Value for the Gamow-Teller Strength of the Sn100 Beta Decay

Lubos¹,

Park²,

Faestermann³

et al. 2019

Phys. Rev. Lett.

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“…Full system tests using an easy and fast variation of rates and energy deposit are an important ingredient to reach best performance under the expected extreme conditions which cannot be achieved using standard calibration sources. Examples are the pion tracker [Wir16] developed for the HADES experiment operating at particle rates up to 10 8 /s, the implantation detectors SIMBA [Hin12] and WAS3ABi [Cel16] developed for high resolution decay spectroscopy experiments at GSI(Darmstadt) and RIKEN (Japan), or the TREX [Bil12] detector telescopes for the Miniball experiment at CERN.…”

Section: For Heavy Ion Machines Sis18@gsi Fair@gsi and Ribf@rikenmentioning

confidence: 99%

Physics at the Munich Tandem Accelerator Laboratory

Dollinger

2018

Nuclear Physics News

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This review reports on the science performed in various fields at the Munich tandem accelerator during the past decade. It covers nuclear structure studies, also with respect to astro-and particle physics as well as for the understanding of fundamental symmetries, the extremely sensitive detection of long-lived radionuclides from Supernova or r-process production with accelerator mass spectrometry and studies of the elemental composition of thin films with extreme depth resolution and sensitivity by elastic recoil detection (ERD). The ion microbeam is used for 3D hydrogen microscopy as well as in radiobiology to study the response of living cells on welldefined irradiations. In medical research new therapeutic methods of tumour irradiation are tested using proton minibeams as well as the determination of ion ranges in tissue with ionoacoustics. Primary and secondary beams from the accelerator are also used for development and testing of detector components in large setups, e.g. at the LHC, and for testing new kinds of fuel materials of high uranium density to use them as medium enriched fuels at the Munich research reactor FRM II in the future.

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“…The flight time T F through the separation and identification systems was calculated with LISE++ [40], where T F in the rest frame of the ions ranged from 600 to 630 ns. This experiment has enabled the discovery of several new isotopes- 90 Pd, 92 Ag, 94 Cd, and 96 In [41]-as well as the measurement of half-lives, β-decay endpoint energies, and β-delayed proton branching ratios of N = Z − 1 nuclei 91 Pd, 95 Cd, 97 In, and 99 Sn [42]. Ion implantation and particle decay (β, βp, p) measurements were carried out by the Wide-range Active Silicon Strip Stopper Array for Beta and Ion detection (WAS3ABi) [43].…”

Section: Experiments and Analysismentioning

confidence: 99%

Properties of γ -decaying isomers and isomeric ratios in the Sn100 region

Park¹,

Krücken²,

Lubos³

et al. 2017

Phys. Rev. C

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Half-lives and energies of γ rays emitted in the decay of isomeric states of nuclei in the vicinity of the doubly magic 100 Sn were measured in a decay spectroscopy experiment at Rikagaku Kenkyusho (The Institute of Physical and Chemical Research) of Japan Nishina Center. The measured half-lives, some with improved precision, are consistent with literature values. Three new results include a 55-keV E2 γ ray from a new (4 + ) isomer with T 1/2 = 0.23(6) μs in 92 Rh, a 44-keV E2 γ ray from the (15 + ) isomer in 96 Ag, and T 1/2 (6 + ) = 13(2) ns in 98 Cd. Shell-model calculations of electromagnetic transition strengths in the (p 1/2 ,g 9/2 ) model space agree with the experimental results. In addition, experimental isomeric ratios were compared to the theoretical predictions derived with an abrasion-ablation model and the sharp cutoff model. The results agreed within a factor of 2 for most isomers. From the nonobservation of time-delayed γ rays in 100 Sn, new constraints on the T 1/2 , γ -ray energy, and internal conversion coefficients are proposed for the hypothetical isomer in 100 Sn.

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New Isotopes and Proton Emitters–Crossing the Drip Line in the Vicinity ofSn100

Cited by 38 publications

References 33 publications

Improved Value for the Gamow-Teller Strength of the Sn100 Beta Decay

Improved Value for the Gamow-Teller Strength of the Sn100 Beta Decay

Physics at the Munich Tandem Accelerator Laboratory

Properties of γ -decaying isomers and isomeric ratios in the Sn100 region

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