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Kozub, R. L.; Lin, Jui‐Teng; Mateja, J. F.; Lister, C. J.; Millener, D.J.; Olness, J.W.; Warburton, E.K.

doi:10.1103/physrevc.27.158

Cited by 13 publications

(36 citation statements)

References 23 publications

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“…The 7 Li( 18 O,αγ) reaction was used to measure the lifetime of the lowest 9/2 + level. [16]. A measurement of the γ decays following β decay of the 5/2 + ground state (g.s.)…”

Section: Introductionmentioning

confidence: 99%

Higher-spin structures inF21andNa25

et al. 2015

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Excited states were investigated in 21 F and 25 Na using the 9 Be( 14 C,pnγ) reaction at 30, 35, and 45 MeV and the 9 Be( 18 O,pnγ) reaction at 35 MeV. Protons were detected and identified in an E-∆E telescope at 0 o in coincidence with one or more γ radiations in the FSU Compton-suppressed Ge detector array. Many new levels and electromagnetic decays were observed, especially among the higher spin states. Angular distributions and mean lifetimes were measured wherever possible in both nuclei. The energy levels of the positive-parity states in the two nuclei agree rather well with shell model calculations using both the USDA and WBP interactions up to the highest spins observed of 13/2h. Both a weak coupling approximation and shell model calculations using the WBP interaction generally reproduce the negative-parity states in 21 F. The shell model calculations reproduce relatively well the measured M1 and E2 transitions in both nuclei, but overpredict the parity-changing E1 transitions in 21 F, the only nucleus in which negative-parity states were observed in the present experiment.

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“…The 7 Li( 18 O,αγ) reaction was used to measure the lifetime of the lowest 9/2 + level. [16]. A measurement of the γ decays following β decay of the 5/2 + ground state (g.s.)…”

Section: Introductionmentioning

confidence: 99%

Higher-spin structures inF21andNa25

et al. 2015

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“…[mb], to the known bound states in 16 N via the (d,p) reaction. The Distorted Wave Born Approximation (DWBA) approach has been adopted in the present work due to its reliable calculation of single-neutron transfer reaction cross sections in the energy range of interest.…”

Section: The Distorted Wave Born Approximation Approachmentioning

confidence: 99%

“…The integrated cross sections, σ from the DWBA approach are defined by the integration over Θ cm from 0 up through a maximum angle, Θ max cm . The cross sections are combined with known spectroscopic information about 16 N to provide estimates of the 16 N m fraction in the beam. The required properties of 16 N include the relative spectroscopic overlaps (S ), which have been extracted from the 15 N(d,p) reaction data [18,19,20], as well as the measured relative γ-ray decay branches from the excited 1 − and 3 − levels [12].…”

Section: The Distorted Wave Born Approximation Approachmentioning

confidence: 99%

“…[1,2,3,4,5,6,7,8,9,10,11]. One reaction method that has shown promise for producing 16 N reaction from the DWBA approach at reaction energies of (a) 7.9 MeV/u and (b) 13.2 MeV/u. The solid (dashed) lines represent the neutron transfer from the 15 N 1/2 − ground state into the 2 − (0 − ) final bound state in 16 N. The chosen DWBA optical model parameter sets 1 [21,22,23] and 2 [24,25] are represented by the thick garnet (dark) and thin gold (light) lines, respectively.…”

Section: Introductionmentioning

confidence: 99%

“…Differing transfer values give different population yields as a function of center-of-mass angle Θ cm , namely their differential cross sections, dσ/dΩ cm [mb/sr]. The relation of Θ cm to the laboratory angle of a 16 N recoil, Θ lab , for these inverse kinematic reactions is Θ cm ≈ 10 • (45 • ) → Θ lab ≈ 1 • (4 • ), and remains similar over energies of interest (3 -16 MeV/u). Therefore, a direct relation exists between the acceptance in Θ lab and varying populations of the states in 16 N and ultimately leading to changes in the 16 N m -to-16 N g ratio.…”

Section: Introductionmentioning

confidence: 99%

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In-flight production of an isomeric beam of $^{16}$N

Hoffman,

Tang,

Avila

et al. 2022

Preprint

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An in-flight beam of 16 N was produced via the single-neutron adding (d,p) reaction in inverse kinematics at the recently upgraded Argonne Tandem Linear Accelerator System (ATLAS) in-flight system. The amount of the 16 N beam which resided in its excited 0.120-MeV J π = 0 − isomeric state (T 1/2 ≈ 5 µs) was determined to be 40(5)% at a reaction energy of 7.9(3) MeV/u, and 24(2)% at a reaction energy of 13.2(2) MeV/u. The isomer measurements took place at an experimental station ≈ 30 m downstream of the production target and utilized an Al beam-stopping foil and a HPGe Clover detector. Composite 16 N beam rate determinations were made at the experimental station and the focal plane of the Argonne in-flight radioactive ion-beam separator (RAISOR) with Si ∆E-E telescopes. A Distorted Wave Born Approximation (DWBA) approach was coupled with the known spectroscopic information on 16 N in order to estimate the relative 16 N isomer yields and composite 16 N beam rates. In addition to the observed reaction-energy dependence of the isomer fraction, a large sensitivity to angular acceptance of the recoils was also observed.

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Nuclear Data Sheets for A = 21

Firestone

2004

Nuclear Data Sheets

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Lifetimes of levels inF20,21,

Cited by 13 publications

References 23 publications

Higher-spin structures inF21andNa25

Higher-spin structures inF21andNa25

In-flight production of an isomeric beam of $^{16}$N

Nuclear Data Sheets for A = 21

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