Mass Measurements of Very Neutron-Deficient Mo and Tc Isotopes and Their Impact on rp Process Nucleosynthesis

E. Haettner; D. Ackermann; G. Audi; K. Blaum; M. Block; S. Eliseev; T. Fleckenstein; F. Herfurth; F. P. Hessberger; S. Hofmann; J. Ketelaer; J. Ketter; H. -J. Kluge; G. Marx; M. Mazzocco; Yu. N. Novikov; W. R. Plass; S. Rahaman; T. Rauscher; D. Rodriguez; H. Schatz; C. Scheidenberger; L. Schweikhard; B. Sun; P. G. Thirolf; G. Vorobjev; M. Wang; C. Weber

doi:10.1103/PhysRevLett.106.122501

Mass Measurements of Very Neutron-Deficient Mo and Tc Isotopes and Their Impact on rp Process Nucleosynthesis

E. Haettner
, D. Ackermann
, G. Audi
, K. Blaum
, M. Block
, S. Eliseev
, T. Fleckenstein
, F. Herfurth
, F. P. Hessberger
, S. Hofmann
, J. Ketelaer
, J. Ketter
, H. -J. Kluge
, G. Marx
, M. Mazzocco
, Yu. N. Novikov
, W. R. Plass
, S. Rahaman
, T. Rauscher
, D. Rodriguez

H. Schatz, C. Scheidenberger, L. Schweikhard, B. Sun, P. G. Thirolf, G. Vorobjev, M. Wang, C. Weber

Research output: Contribution to journal › Letter › peer-review

46 Citations (Scopus)

101 Downloads (Pure)

Abstract

The masses of ten proton-rich nuclides, including the N = Z + 1 nuclides (85)Mo and (87)Tc, were measured with the Penning trap mass spectrometer SHIPTRAP. Compared to the Atomic Mass Evaluation 2003 a systematic shift of the mass surface by up to 1.6 MeV is observed causing significant abundance changes of the ashes of astrophysical x-ray bursts. Surprisingly low alpha separation energies for neutrondeficient Mo and Tc are found, making the formation of a ZrNb cycle in the rp process possible. Such a cycle would impose an upper temperature limit for the synthesis of elements beyond Nb in the rp process.

Original language	English
Article number	122501
Number of pages	5
Journal	Physical Review Letters
Volume	106
Issue number	12
DOIs	https://doi.org/10.1103/PhysRevLett.106.122501
Publication status	Published - 21 Mar 2011

Keywords

NUCLIDES

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Haettner, E., Ackermann, D., Audi, G., Blaum, K., Block, M., Eliseev, S., Fleckenstein, T., Herfurth, F., Hessberger, F. P., Hofmann, S., Ketelaer, J., Ketter, J., Kluge, H. .-J., Marx, G., Mazzocco, M., Novikov, Y. N., Plass, W. R., Rahaman, S., Rauscher, T., ... Weber, C. (2011). Mass Measurements of Very Neutron-Deficient Mo and Tc Isotopes and Their Impact on rp Process Nucleosynthesis. Physical Review Letters, 106(12), Article 122501. https://doi.org/10.1103/PhysRevLett.106.122501

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title = "Mass Measurements of Very Neutron-Deficient Mo and Tc Isotopes and Their Impact on rp Process Nucleosynthesis",

abstract = "The masses of ten proton-rich nuclides, including the N = Z + 1 nuclides (85)Mo and (87)Tc, were measured with the Penning trap mass spectrometer SHIPTRAP. Compared to the Atomic Mass Evaluation 2003 a systematic shift of the mass surface by up to 1.6 MeV is observed causing significant abundance changes of the ashes of astrophysical x-ray bursts. Surprisingly low alpha separation energies for neutrondeficient Mo and Tc are found, making the formation of a ZrNb cycle in the rp process possible. Such a cycle would impose an upper temperature limit for the synthesis of elements beyond Nb in the rp process.",

keywords = "NUCLIDES",

author = "E. Haettner and D. Ackermann and G. Audi and K. Blaum and M. Block and S. Eliseev and T. Fleckenstein and F. Herfurth and Hessberger, \{F. P.\} and S. Hofmann and J. Ketelaer and J. Ketter and Kluge, \{H. -J.\} and G. Marx and M. Mazzocco and Novikov, \{Yu. N.\} and Plass, \{W. R.\} and S. Rahaman and T. Rauscher and D. Rodriguez and H. Schatz and C. Scheidenberger and L. Schweikhard and B. Sun and Thirolf, \{P. G.\} and G. Vorobjev and M. Wang and C. Weber",

year = "2011",

month = mar,

day = "21",

doi = "10.1103/PhysRevLett.106.122501",

language = "English",

volume = "106",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "12",

}

Haettner, E, Ackermann, D, Audi, G, Blaum, K, Block, M, Eliseev, S, Fleckenstein, T, Herfurth, F, Hessberger, FP, Hofmann, S, Ketelaer, J, Ketter, J, Kluge, H-J, Marx, G, Mazzocco, M, Novikov, YN, Plass, WR, Rahaman, S, Rauscher, T, Rodriguez, D, Schatz, H, Scheidenberger, C, Schweikhard, L, Sun, B, Thirolf, PG, Vorobjev, G, Wang, M & Weber, C 2011, 'Mass Measurements of Very Neutron-Deficient Mo and Tc Isotopes and Their Impact on rp Process Nucleosynthesis', Physical Review Letters, vol. 106, no. 12, 122501. https://doi.org/10.1103/PhysRevLett.106.122501

TY - JOUR

T1 - Mass Measurements of Very Neutron-Deficient Mo and Tc Isotopes and Their Impact on rp Process Nucleosynthesis

AU - Haettner, E.

AU - Ackermann, D.

AU - Audi, G.

AU - Blaum, K.

AU - Block, M.

AU - Eliseev, S.

AU - Fleckenstein, T.

AU - Herfurth, F.

AU - Hessberger, F. P.

AU - Hofmann, S.

AU - Ketelaer, J.

AU - Ketter, J.

AU - Kluge, H. -J.

AU - Marx, G.

AU - Mazzocco, M.

AU - Novikov, Yu. N.

AU - Plass, W. R.

AU - Rahaman, S.

AU - Rauscher, T.

AU - Rodriguez, D.

AU - Schatz, H.

AU - Scheidenberger, C.

AU - Schweikhard, L.

AU - Sun, B.

AU - Thirolf, P. G.

AU - Vorobjev, G.

AU - Wang, M.

AU - Weber, C.

PY - 2011/3/21

Y1 - 2011/3/21

N2 - The masses of ten proton-rich nuclides, including the N = Z + 1 nuclides (85)Mo and (87)Tc, were measured with the Penning trap mass spectrometer SHIPTRAP. Compared to the Atomic Mass Evaluation 2003 a systematic shift of the mass surface by up to 1.6 MeV is observed causing significant abundance changes of the ashes of astrophysical x-ray bursts. Surprisingly low alpha separation energies for neutrondeficient Mo and Tc are found, making the formation of a ZrNb cycle in the rp process possible. Such a cycle would impose an upper temperature limit for the synthesis of elements beyond Nb in the rp process.

AB - The masses of ten proton-rich nuclides, including the N = Z + 1 nuclides (85)Mo and (87)Tc, were measured with the Penning trap mass spectrometer SHIPTRAP. Compared to the Atomic Mass Evaluation 2003 a systematic shift of the mass surface by up to 1.6 MeV is observed causing significant abundance changes of the ashes of astrophysical x-ray bursts. Surprisingly low alpha separation energies for neutrondeficient Mo and Tc are found, making the formation of a ZrNb cycle in the rp process possible. Such a cycle would impose an upper temperature limit for the synthesis of elements beyond Nb in the rp process.

KW - NUCLIDES

U2 - 10.1103/PhysRevLett.106.122501

DO - 10.1103/PhysRevLett.106.122501

M3 - Letter

SN - 0031-9007

VL - 106

JO - Physical Review Letters

JF - Physical Review Letters

IS - 12

M1 - 122501

ER -

Mass Measurements of Very Neutron-Deficient Mo and Tc Isotopes and Their Impact on rp Process Nucleosynthesis

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