Fragmentation of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi mathvariant="normal">Kr</mml:mi></mml:mrow><mml:mprescripts /><mml:mrow /><mml:mrow><mml:mn>78</mml:mn></mml:mrow><mml:mrow /><mml:mrow /></mml:mmultiscripts></mml:mrow></mml:math>projectiles

Pfaff, R.; Dj, Morrissey; Benenson, W.; Fauerbach, M.; Hellström, M.; Cf, Powell; Sherrill, B. M.; Steiner, M.; Ja, Winger

doi:10.1103/physrevc.53.1753

Cited by 69 publications

(47 citation statements)

References 20 publications

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“…3. The non-observation of 69 Br in the radioactive beam experiments of Blank et al [19] and Pfaff et al [22] means that its lifetime is less than 24 nsec which implies that it is proton unbound by more than 500 keV [22]. This is compatible with the HF result shown in Fig.…”

Section: Proton-rich Masses and Separation Energiessupporting

confidence: 81%

Proton drip-line calculations and therpprocess

et al. 2002

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One-proton and two-proton separation energies are calculated for proton-rich nuclei in the region A = 41 − 75. The method is based on Skyrme Hartree-Fock calculations of Coulomb displacement energies of mirror nuclei in combination with the experimental masses of the neutron-rich nuclei. The implications for the proton drip line and the astrophysical rp-process are discussed. This is done within the framework of a detailed analysis of the sensitivity of rp process calculations in type I X-ray burst models on nuclear masses. We find that the remaining mass uncertainties, in particular for some nuclei with N = Z, still lead to large uncertainties in calculations of X-ray burst light curves. Further experimental or theoretical improvements of nuclear mass data are necessary before observed X-ray burst light curves can be used to obtain quantitative constraints on ignition conditions and neutron star properties. We identify a list of nuclei for which improved mass data would be most important.

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Section: Proton-rich Masses and Separation Energiessupporting

confidence: 81%

Proton drip-line calculations and therpprocess

et al. 2002

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“…Based on model dependent fragmentation cross-section predictions for these isotopes, lifetimes have been estimated to be less than 24 ns and 30 ns, respectively [10]. Again, within the present systematic uncertainties this is in the possible lifetime range of proton capture processes in high density environments.…”

Section: Possible Impact On Isotopic Abundance In X-ray Burstsmentioning

confidence: 89%

Nuclear structure of the exotic mass region along the rp process path

et al. 2005

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Isomeric states in the nuclei along the rapid proton capture process path are studied by the projected shell model. Emphasis is given to two waiting point nuclei 68 Se and 72 Kr that are characterized by shape coexistence. Energy surface calculations indicate that the ground state of these nuclei corresponds to an oblate-deformed minimum, while the lowest state at the prolate-deformed minimum can be considered as a shape isomer. The impact of these shape isomer states on isotopic abundance in x-ray bursts is studied in a multi-mass-zone x-ray burst model by assuming an upper-lower limit approach.

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“…Measurements must then be carried out through indirect techniques or through direct observations immediately following 69 Br production using in-flight decay [2]. Initial searches attempted to produce 69 Br through fusion-evaporation reactions [4] and 78 Kr projectile fragmentation, leading to a lifetime upper limit of 24 ns [3,5] [6]. It still, however, lies near the proton drip line and is difficult to produce in sufficient quantities required for measurement in a Penning trap.…”

mentioning

confidence: 99%

“…The short lifetime and location beyond the proton drip line compli- * amrogers@phy.anl.gov cates the direct study of 69 Br. Traditional implantationdecay studies as well as direct mass measurements are not possible as the lifetime is too short [3]. Measurements must then be carried out through indirect techniques or through direct observations immediately following 69 Br production using in-flight decay [2].…”

mentioning

confidence: 99%