Determination of the proton separation energy of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mmultiscripts><mml:mi mathvariant="normal">Rh</mml:mi><mml:mprescripts /><mml:none /><mml:mrow><mml:mn>93</mml:mn></mml:mrow></mml:mmultiscripts></mml:math>from mass measurements

Fallis, J.; Clark, J. A.; Sharma, K. S.; Savard, G.; Buchinger, F.; Caldwell, S.; Crawford, J. E.; Deibel, C. M.; Fisker, J. L.; Gulick, S.; Hecht, A. A.; Lascar, D.; Lee, J. K.P.; Levand, A. F.; Li, G.; Lundgren, B. F.; Parikh, A.; Russell, S.; Vorst, M. Scholte Van De; Scielzo, N. D.; Segel, R. E.; Sharma, H. P.; Sinha, S.; Sternberg, M.; Sun, T.; Tanihata, I.; Schelt, J. Van; Wang, J. C.; Wang, Y.; Wrede, C.; Zhou, Zhiyi

doi:10.1103/physrevc.78.022801

Cited by 30 publications

(37 citation statements)

References 17 publications

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“…On the proton-rich side of β stability, between elements Mo and Pd, there is a region where the masses have only recently been determined [1][2][3]. These masses have become the subject of much interest [1][2][3][4][5][6][7] because two astrophysical nucleosynthetic processes, the rp and νp processes, pass through this region.…”

Section: Introductionmentioning

confidence: 99%

“…These masses have become the subject of much interest [1][2][3][4][5][6][7] because two astrophysical nucleosynthetic processes, the rp and νp processes, pass through this region. The proton-capture (p,γ ) and photodisintegration (γ ,p) rates needed to model these processes depend on the proton-separation energies S p which, due to the lack of mass information, have had to be calculated using extrapolated mass values or values from mass models.…”

Section: Introductionmentioning

confidence: 99%

“…It was determined from these studies that the S p value of 93 Rh was of particular importance in determining the νp-process 92 Mo/ 94 Mo production ratio. Our recent measurements of 92 Ru and 93 Rh [1] have determined that the solar 92 Mo/ 94 Mo abundance ratio cannot be produced solely from the νp process given the environmental conditions used for this model [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

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Mass measurements of isotopes of Nb, Mo, Tc, Ru, and Rh along theνp- andrp-process paths using the Canadian Penning trap mass spectrometer

Fallis¹,

Clark²,

Sharma³

et al. 2011

Phys. Rev. C

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The reaction paths of two proposed nucleosynthetic processes on the proton-rich side of stability, the rp and νp processes, pass through a region of isotopes between Mo and Pd where masses had long gone unmeasured. Precise knowledge of the paths and final abundances of these two processes has been limited by the corresponding lack of precision in the proton-separation energies S p when derived from extrapolated masses. The masses of 18 neutron-deficient isotopes of Nb, Mo, Tc, Ru, and Rh have been measured using the Canadian Penning trap mass spectrometer. Three of the masses presented, 90 Mo, 91 Mo, and 93 Tc, provide the first direct measurement of the masses of these nuclides, and the others provide confirmation of recent measurements using other Penning traps. Included in this work is a measurement of the mass of 87 Mo, which differs by 3.7σ from the mass presented in the 2003 Atomic Mass Evaluation. This leads to a change in the S p value of 88 Tc which reduces the suppression of flow of the νp-process path through 87 Mo(p, γ ) 88 Tc reported following the mass measurement of 88 Tc [C. Weber et al., Phys. Rev. C 78, 054310 (2008)]. This in turn affects the resulting νp-process abundances.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Mass measurements of isotopes of Nb, Mo, Tc, Ru, and Rh along theνp- andrp-process paths using the Canadian Penning trap mass spectrometer

Fallis¹,

Clark²,

Sharma³

et al. 2011

Phys. Rev. C

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“…Very recently a large number of high-precision mass values in the vicinity of the rp-process and the νp-process paths have been obtained at the JYFLTRAP (Jyväskylä, Finland) and SHIPTRAP (GSI Darmstadt, Germany) facilities in order to understand these nucleosynthesis processes better [13]. Mass measurements related to nuclear astrophysics have also been performed with LEBIT (East Lansing, USA) [14] and CPT (Argonne, USA) [15].…”

Section: Field Of Applicationmentioning

confidence: 99%

Precision Penning trap mass measurements on exotic ions: status and perspectives

Blaum

Block

2009

Hyperfine Interact

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Penning traps are powerful instruments for the precise and accurate mass determination of rare isotopes. At present, many Penning trap facilities installed at radioactive beam facilities provide key data for nuclear astrophysics, for the study of nuclear structure evolution far from stability, and the test of fundamental interactions. This article summarizes the present status and current limits in the field of high-precision Penning trap mass measurements on short-lived exotic ions.

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“…the observed abundances of some of the p-nuclei [4,5] and on the r-process which is responsible for the creation of about half of the heavy elements and whose path critically depends on the neutron capture Q-value of very neutron-rich isotopes. This latter work [6,7] has been performed with isotopes produced by a weak 252 Cf source.…”

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confidence: 99%

Report on recent activities at the CPT mass spectrometer

Savard

2010

Hyperfine Interact

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The present report gives a short summary of current work at the CPT mass spectrometer and provides a list of recent references for work published in the last few years.Keywords Mass-spectrometry · Canadian Penning Trap (CPT) mass spectrometer · Astrophysical rp-process · 252 Cf source The CPT (Canadian Penning Trap) mass spectrometer is located on-line at the ATLAS superconducting linear accelerator facility of Argonne National Laboratory (ANL). It is operated by a collaboration involving ANL, the University of Manitoba and McGill University and is used to perform precision mass measurements on shortlived and stable isotopes. The short-lived isotopes are created by heavy-ion reactions or spontaneous fission, cooled in a gas catcher, purified in an isobar separator, and injected into a Penning trap located in the highly stable field of a superconducting solenoid where the mass measurements take place. The system is both efficient and accurate, having performed measurements on isotopes produced at the few ions per second level and, in cases with higher yield, to accuracy down to a ppb.The CPT mass spectrometer was built initially to improve Q-value measurements on short-lived superallowed Fermi emitters [1] and along the astrophysical rp-process path [2]. Although both of these activities have continued over the last few years [3] and this work is being wrapped up with larger publications in preparation, the main emphasis of the work on short-lived isotopes has shifted over the last few years to measurements on the newly proposed νp-process that could tentatively explain

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Determination of the proton separation energy ofRh93from mass measurements

Cited by 30 publications

References 17 publications

Mass measurements of isotopes of Nb, Mo, Tc, Ru, and Rh along theνp- andrp-process paths using the Canadian Penning trap mass spectrometer

Mass measurements of isotopes of Nb, Mo, Tc, Ru, and Rh along theνp- andrp-process paths using the Canadian Penning trap mass spectrometer

Precision Penning trap mass measurements on exotic ions: status and perspectives

Report on recent activities at the CPT mass spectrometer

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