Recoil proton tagged knockout reaction for 8He

Cao, Zeyuan; Ye, Y. L.; Xiao, Jun; Lv, Lei; Jiang, D. X.; Tao, Zheng; Hua, H.; Li, Z. H.; Li, X. Q.; Ge, Yufeng; Lou, J. L.; Qiao, Rui; Li, Q. T.; You, H. B.; Chen, R. J.; Pang, Dan; Sakuraï, H.; Otsu, H.; Nishimura, M.; Sakaguchi, Satoshi; Baba, H.; Togano, Y.; Yoneda, K.; Li, C.; Wang, S.; Wang, H.; Li, K. A.; Nakamura, Takashi; Nakayama, Yoshiaki; Kondo, Y.; Deguchi, S.; Satou, Y.; Tshoo, K.

doi:10.1016/j.physletb.2011.12.009

Cited by 48 publications

(23 citation statements)

References 27 publications

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“…Its ground state was identified in the 7 Li(t, 3 He) charge-exchange reaction [1,2] as a J π = 3/2 − resonance with a width of 0.16(3) MeV (full width at half maximum; FWHM) at 0.44(3) MeV above the 6 He +n threshold. This observation was further confirmed by other experiments [3][4][5][6][7][8][9][10], although quantitative values slightly differ, as shown in Fig. 1.…”

Section: Introductionsupporting

confidence: 84%

“…decay in Lamp. The thick solid red line is the total fit including the contributions due to the populated states (dashed lines), the fivebody phase-space background 6 He + 9 Be → 4 He +n + n + n + 8 Be (curve I), the three-body phase-space background 6 He + 9 Be → 6 He +n + 8 Be (curve II), and the direct decays of 10 Be * (curve III).…”

Section: Analysis and Resultsmentioning

confidence: 99%

“…Results from this same experiment [36] reported the strong population of a 11 Be excited state at E x = 10.6 MeV, higher than the three-neutron emission threshold, which lies at 8.98 MeV [22]. The authors also provided evidence for a sequential population of 10 Be excited state at E x = 9.6 MeV, above the 8 Be + 2n threshold situated at 8.48 MeV [22]. We have investigated the contributions in the center-of-mass energy of the 6 He + n system due to the direct breakup of this 11 Be ( 10 Be) excited state into 8 Be + 3n ( 8 Be + 2n).…”

Section: B Analysis Of 7 He Spectramentioning

confidence: 89%

“…[9] and also adopted in Ref. [10]. It should, however, be noted that the reported SF decrease of 25% when the estimation of γ 2 sp for = 1 proposed by Bohr and Mottelson [46] is considered.…”

Section: B Analysis Of 7 He Spectramentioning

confidence: 99%

“…In all cases, the relative angular momentum between 6 He(0 + ) and n was set equal to unity. Because the results could be dependent on channel radius R we opted for the value of 4 fm, which has been used in most recent works [9,10,45] and, therefore, permits us to make R-independent comparisons. Due to the significantly better energy resolution achieved with LEDA than with Lamp, the χ 2 surface was only determined by fitting the spectrum from LEDA data.…”

Section: B Analysis Of 7 He Spectramentioning

confidence: 99%

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Spectroscopy ofHe7using theBe9(He
Renzi
¹
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Raabe
²
,
Randisi
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et al. 2016
Phys. Rev. C
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The unbound nucleus 7 He has been investigated via the reaction of a 16.8 MeV 6 He radioactive ion beam on a 9 Be target. The measurement of the outgoing 8 Be through its well characterized two-α decay permitted the energy of the 6 He +n system to be reconstructed. Through comparison with a complete Monte Carlo simulation incorporating R-matrix lineshapes, the 7 He ground state was determined to lie 0.380(28) MeV above the neutron decay with a width of = 0.179(21) MeV. A neutron spectroscopic factor SF = 0.608(18) was extracted in agreement with the most recent calculations. Significant evidence was found for a broad resonance lying at 2.6(2) MeV above threshold with a FWHM = 2.3(3) MeV. These parameters are fully consistent with the properties of 1/2 − state reported by Wuosmaa et al. [Phys. Rev. C 72, 061301(R) (2005)]. Limits were also put on the presence of narrow resonances seen in earlier experiments.

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