Spectroscopy and lifetime measurements near the proton drip line: 26,27,28P

B. Longfellow, A. Gade, B.A. Brown, D. Bazin, P.C. Bender, M. Bowry, P.D. Cottle, B. Elman, E. Lunderberg, A. Magilligan, M. Spieker, D. Weisshaar, S.J. Williams

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Abstract

We report on the observation of excited states in the neutron-deficient phosphorus isotopes 26,27,28P via in-beam γ-ray spectroscopy with both high-efficiency and high-resolution detector arrays. In 26P, a previously unobserved level has been identified at 244(3) keV, two new measurements of the astrophysically important 3/2+ resonance in 27P have been performed, γ decays have been assigned to the proton-unbound levels at 2216 and 2483 keV in 28P, and the γ-ray line-shape method has been used to make the first determination of the lifetimes of the two lowest-lying excited states in 28P. The expected Thomas-Ehrman shifts were calculated and applied to levels in the mirror nuclei. The resulting level energies from this procedure were then compared with the energies of known states in 26,27,28P.
Original languageEnglish
Article number064330
JournalPhysical Review C
Volume99
Issue number6
DOIs
Publication statusPublished - 26 Jun 2019
Externally publishedYes

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phosphorus isotopes
life (durability)
protons
rays
spectroscopy
excitation
line shape
energy levels
mirrors
neutrons
nuclei
shift
high resolution
detectors
decay
energy

Cite this

Longfellow, B., Gade, A., Brown, B. A., Bazin, D., Bender, P. C., Bowry, M., ... Williams, S. J. (2019). Spectroscopy and lifetime measurements near the proton drip line: 26,27,28P. Physical Review C, 99(6), [064330]. https://doi.org/10.1103/PhysRevC.99.064330
Longfellow, B. ; Gade, A. ; Brown, B.A. ; Bazin, D. ; Bender, P.C. ; Bowry, M. ; Cottle, P.D. ; Elman, B. ; Lunderberg, E. ; Magilligan, A. ; Spieker, M. ; Weisshaar, D. ; Williams, S.J. / Spectroscopy and lifetime measurements near the proton drip line : 26,27,28P. In: Physical Review C. 2019 ; Vol. 99, No. 6.
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abstract = "We report on the observation of excited states in the neutron-deficient phosphorus isotopes 26,27,28P via in-beam γ-ray spectroscopy with both high-efficiency and high-resolution detector arrays. In 26P, a previously unobserved level has been identified at 244(3) keV, two new measurements of the astrophysically important 3/2+ resonance in 27P have been performed, γ decays have been assigned to the proton-unbound levels at 2216 and 2483 keV in 28P, and the γ-ray line-shape method has been used to make the first determination of the lifetimes of the two lowest-lying excited states in 28P. The expected Thomas-Ehrman shifts were calculated and applied to levels in the mirror nuclei. The resulting level energies from this procedure were then compared with the energies of known states in 26,27,28P.",
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Longfellow, B, Gade, A, Brown, BA, Bazin, D, Bender, PC, Bowry, M, Cottle, PD, Elman, B, Lunderberg, E, Magilligan, A, Spieker, M, Weisshaar, D & Williams, SJ 2019, 'Spectroscopy and lifetime measurements near the proton drip line: 26,27,28P', Physical Review C, vol. 99, no. 6, 064330. https://doi.org/10.1103/PhysRevC.99.064330

Spectroscopy and lifetime measurements near the proton drip line : 26,27,28P. / Longfellow, B.; Gade, A.; Brown, B.A.; Bazin, D.; Bender, P.C.; Bowry, M.; Cottle, P.D.; Elman, B.; Lunderberg, E.; Magilligan, A.; Spieker, M.; Weisshaar, D.; Williams, S.J.

In: Physical Review C, Vol. 99, No. 6, 064330, 26.06.2019.

Research output: Contribution to journalArticle

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T1 - Spectroscopy and lifetime measurements near the proton drip line

T2 - 26,27,28P

AU - Longfellow, B.

AU - Gade, A.

AU - Brown, B.A.

AU - Bazin, D.

AU - Bender, P.C.

AU - Bowry, M.

AU - Cottle, P.D.

AU - Elman, B.

AU - Lunderberg, E.

AU - Magilligan, A.

AU - Spieker, M.

AU - Weisshaar, D.

AU - Williams, S.J.

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Y1 - 2019/6/26

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AB - We report on the observation of excited states in the neutron-deficient phosphorus isotopes 26,27,28P via in-beam γ-ray spectroscopy with both high-efficiency and high-resolution detector arrays. In 26P, a previously unobserved level has been identified at 244(3) keV, two new measurements of the astrophysically important 3/2+ resonance in 27P have been performed, γ decays have been assigned to the proton-unbound levels at 2216 and 2483 keV in 28P, and the γ-ray line-shape method has been used to make the first determination of the lifetimes of the two lowest-lying excited states in 28P. The expected Thomas-Ehrman shifts were calculated and applied to levels in the mirror nuclei. The resulting level energies from this procedure were then compared with the energies of known states in 26,27,28P.

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