alpha- and neutron-induced reactions on ruthenium isotopes

W. Rapp; M. Heil; D. Hentschel; F. Kappeler; R. Reifarth; H.J. Brede; H. Klein; T. Rauscher

doi:10.1103/PhysRevC.66.015803

alpha- and neutron-induced reactions on ruthenium isotopes

W. Rapp, M. Heil, D. Hentschel, F. Kappeler, R. Reifarth, H.J. Brede, H. Klein, T. Rauscher

Centre for Astrophysics Research (CAR)

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

Abstract

The uncertain origin of the proton rich Mo and Ru isotopes has motivated cross-section measurements of alpha- and neutron-induced reactions. The experiments were performed via the activation technique by irradiating thin layers of natural ruthenium with alpha-particle beams close to the Gamov window of the p process between 7.0 and 10.5 MeV. The cross sections of the reactions Ru-96(alpha,gamma), Ru-96(alpha,n), Ru-96(alpha,p), and Ru-98(alpha,n) could be determined with uncertainties of typically 10%. On average, these results are about two to three times smaller than recent statistical model predictions. Additional activations in a quasistellar neutron spectrum corresponding to kT=25 keV allowed us to obtain the complementary stellar (n,gamma) cross sections for Ru-96, Ru-102, and Ru-104. In these cases the agreement with model calculations is considerably better.

Original language	English
Article number	015803
Number of pages	11
Journal	Physical Review C (nuclear physics)
Volume	66
Issue number	1
DOIs	https://doi.org/10.1103/PhysRevC.66.015803
Publication status	Published - Jul 2002

Keywords

STATISTICAL-MODEL CALCULATIONS
CAPTURE CROSS-SECTIONS
ASTROPHYSICAL REACTION-RATES
NUCLEOSYNTHESIS
P-PROCESS

Access to Document

10.1103/PhysRevC.66.015803

Cite this

@article{9adff9b4834449f4b63b0672f07bcdc1,

title = "alpha- and neutron-induced reactions on ruthenium isotopes",

abstract = "The uncertain origin of the proton rich Mo and Ru isotopes has motivated cross-section measurements of alpha- and neutron-induced reactions. The experiments were performed via the activation technique by irradiating thin layers of natural ruthenium with alpha-particle beams close to the Gamov window of the p process between 7.0 and 10.5 MeV. The cross sections of the reactions Ru-96(alpha,gamma), Ru-96(alpha,n), Ru-96(alpha,p), and Ru-98(alpha,n) could be determined with uncertainties of typically 10%. On average, these results are about two to three times smaller than recent statistical model predictions. Additional activations in a quasistellar neutron spectrum corresponding to kT=25 keV allowed us to obtain the complementary stellar (n,gamma) cross sections for Ru-96, Ru-102, and Ru-104. In these cases the agreement with model calculations is considerably better.",

keywords = "STATISTICAL-MODEL CALCULATIONS, CAPTURE CROSS-SECTIONS, ASTROPHYSICAL REACTION-RATES, NUCLEOSYNTHESIS, P-PROCESS",

author = "W. Rapp and M. Heil and D. Hentschel and F. Kappeler and R. Reifarth and H.J. Brede and H. Klein and T. Rauscher",

year = "2002",

month = jul,

doi = "10.1103/PhysRevC.66.015803",

language = "English",

volume = "66",

journal = "Physical Review C (nuclear physics)",

issn = "2469-9985",

publisher = "American Physical Society (APS)",

number = "1",

}

TY - JOUR

T1 - alpha- and neutron-induced reactions on ruthenium isotopes

AU - Rapp, W.

AU - Heil, M.

AU - Hentschel, D.

AU - Kappeler, F.

AU - Reifarth, R.

AU - Brede, H.J.

AU - Klein, H.

AU - Rauscher, T.

PY - 2002/7

Y1 - 2002/7

N2 - The uncertain origin of the proton rich Mo and Ru isotopes has motivated cross-section measurements of alpha- and neutron-induced reactions. The experiments were performed via the activation technique by irradiating thin layers of natural ruthenium with alpha-particle beams close to the Gamov window of the p process between 7.0 and 10.5 MeV. The cross sections of the reactions Ru-96(alpha,gamma), Ru-96(alpha,n), Ru-96(alpha,p), and Ru-98(alpha,n) could be determined with uncertainties of typically 10%. On average, these results are about two to three times smaller than recent statistical model predictions. Additional activations in a quasistellar neutron spectrum corresponding to kT=25 keV allowed us to obtain the complementary stellar (n,gamma) cross sections for Ru-96, Ru-102, and Ru-104. In these cases the agreement with model calculations is considerably better.

AB - The uncertain origin of the proton rich Mo and Ru isotopes has motivated cross-section measurements of alpha- and neutron-induced reactions. The experiments were performed via the activation technique by irradiating thin layers of natural ruthenium with alpha-particle beams close to the Gamov window of the p process between 7.0 and 10.5 MeV. The cross sections of the reactions Ru-96(alpha,gamma), Ru-96(alpha,n), Ru-96(alpha,p), and Ru-98(alpha,n) could be determined with uncertainties of typically 10%. On average, these results are about two to three times smaller than recent statistical model predictions. Additional activations in a quasistellar neutron spectrum corresponding to kT=25 keV allowed us to obtain the complementary stellar (n,gamma) cross sections for Ru-96, Ru-102, and Ru-104. In these cases the agreement with model calculations is considerably better.

KW - STATISTICAL-MODEL CALCULATIONS

KW - CAPTURE CROSS-SECTIONS

KW - ASTROPHYSICAL REACTION-RATES

KW - NUCLEOSYNTHESIS

KW - P-PROCESS

U2 - 10.1103/PhysRevC.66.015803

DO - 10.1103/PhysRevC.66.015803

M3 - Article

SN - 2469-9985

VL - 66

JO - Physical Review C (nuclear physics)

JF - Physical Review C (nuclear physics)

IS - 1

M1 - 015803

ER -

alpha- and neutron-induced reactions on ruthenium isotopes

Abstract

Keywords

Access to Document

Fingerprint

Cite this