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Dive into the research topics where L. Valdez is active.

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Featured researches published by L. Valdez.


International Symposium on Origin of Matter and Evolutions of Galaxies 2011, OMEG 2011 | 2012

Gamow-Teller transitions from 56Ni

M. Sasano; G. Perdikakis; R. G. T. Zegers; Sam M. Austin; D. Bazin; B. A. Brown; C. Caesar; A. L. Cole; J. M. Deaven; N. Ferrante; C. J. Guess; G. W. Hitt; H. Honma; R. Meharchand; F. Montes; J. Palardy; A. Prinke; L. A. Riley; H. Sakai; M. Scott; A. Stolz; Takeru K. Suzuki; L. Valdez; K. Yako

A new technique to measure (p,n) charge-exchange reactions in inverse kinematics at intermediate energies on unstable isotopes was successfully developed and used to study the 56Ni(p,n) reaction at 110 MeV/u. Gamow-Teller transition strengths from 56Ni to 56Cu were obtained and compared with shell-model predictions in the pf-shell using the KB3G and GXPF1A interactions. The calculations with the GXPF1A interaction reproduce the experimental GT strength distribution much better than the calculations that employed the KB3G interaction, indicating deficiencies in the spin-orbit and proton-neutron residual potentials for the latter. The results are important for improving the description of electron-capture rates on nuclei in the iron region, which are important for modeling the late evolution of core-collapse and thermonuclear supernovae.


Physical Review Letters | 2011

Gamow-Teller transition strengths from 56Ni.

M. Sasano; G. Perdikakis; R. G. T. Zegers; Sam M. Austin; D. Bazin; B. A. Brown; C. Caesar; A. L. Cole; J. M. Deaven; N. Ferrante; C. J. Guess; G. W. Hitt; R. Meharchand; F. Montes; J. Palardy; A. Prinke; L. A. Riley; H. Sakai; M. Scott; A. Stolz; L. Valdez; K. Yako


Physical Review C | 2012

Extraction of Gamow-Teller strength distributions from 56 Ni and 55 Co via the ( p , n ) reaction in inverse kinematics

M. Sasano; G. Perdikakis; R. G. T. Zegers; Sam M. Austin; D. Bazin; B. A. Brown; C. Caesar; A. L. Cole; J. M. Deaven; N. Ferrante; C. J. Guess; G. W. Hitt; Michio Honma; R. Meharchand; F. Montes; J. Palardy; A. Prinke; L. A. Riley; H. Sakai; M. Scott; A. Stolz; Takeru K. Suzuki; L. Valdez; K. Yako


Physical Review Letters | 2012

Probing Configuration Mixing in 12Be with Gamow-Teller Transition Strengths

R. Meharchand; R. G. T. Zegers; B. A. Brown; Sam M. Austin; T. Baugher; D. Bazin; J. Deaven; A. Gade; G. F. Grinyer; C. J. Guess; M. E. Howard; H. Iwasaki; S. McDaniel; K. Meierbachtol; G. Perdikakis; J. Pereira; A. Prinke; A. Ratkiewicz; Angelo Signoracci; L. Valdez; P. Voss; K. A. Walsh; D. Weisshaar; R. Winkler


Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment | 2012

LENDA: A low energy neutron detector array for experiments with radioactive beams in inverse kinematics

G. Perdikakis; M. Sasano; Sam M. Austin; D. Bazin; C. Caesar; S. Cannon; J. M. Deaven; H. J. Doster; C. J. Guess; G. W. Hitt; J. Marks; R. Meharchand; D. T. Nguyen; D. Peterman; A. Prinke; M. Scott; Y. Shimbara; K. Thorne; L. Valdez; R. G. T. Zegers


Physical Review Letters | 2014

β+ Gamow-Teller transition strengths from 46Ti and stellar electron-capture rates.

S. Noji; R. G. T. Zegers; Sam M. Austin; T. Baugher; D. Bazin; B. A. Brown; C. M. Campbell; A. L. Cole; H. J. Doster; A. Gade; C. J. Guess; S. Gupta; G. W. Hitt; C. Langer; S. Lipschutz; E. Lunderberg; R. Meharchand; Z. Meisel; G. Perdikakis; J. Pereira; F. Recchia; H. Schatz; M. Scott; C. Sullivan; L. Valdez; C. Walz; D. Weisshaar; S. J. Williams; K. Wimmer


Physical Review C | 2015

Gamow-Teller transitions to Ca 45 via the Sc 45 ( t , He 3 + γ ) reaction at 115 MeV / u and its application to stellar electron-capture rates

S. Noji; R. G. T. Zegers; Sam M. Austin; T. Baugher; D. Bazin; B. A. Brown; C. M. Campbell; A. L. Cole; H. J. Doster; A. Gade; C. J. Guess; S. Gupta; G. W. Hitt; C. Langer; S. Lipschutz; E. Lunderberg; R. Meharchand; Z. Meisel; G. Perdikakis; J. Pereira; F. Recchia; H. Schatz; M. Scott; C. Sullivan; L. Valdez; C. Walz; D. Weisshaar; S. J. Williams; K. Wimmer


Physical Review C | 2014

Gamow-Teller transition strengths from Fe 56 extracted from the Fe 56 (t, He 3) reaction

M. Scott; Y. Shimbara; Sam M. Austin; D. Bazin; B. A. Brown; J. M. Deaven; Y. Fujita; C. J. Guess; S. Gupta; G. W. Hitt; D. Koeppe; R. Meharchand; M. Nagashima; G. Perdikakis; A. Prinke; M. Sasano; C. Sullivan; L. Valdez; R. G. T. Zegers


Bulletin of the American Physical Society | 2012

Electron-Capture on Excited States of pf-shell Nuclei in Stellar Environments

A. L. Cole; T.S. Anderson; A.C. Dombos; A.K. Schooley; R. G. T. Zegers; Sam M. Austin; B. A. Brown; L. Valdez; S. Gupta; G. W. Hitt; O. Fawwaz


12th International Symposium on Nuclei in the Cosmos, NIC 2012 | 2012

Probing electron captures on 56 Ni: A new technique to extract Gamow-Teller strengths of unstable nuclei.

G. Perdikakis; M. Sasano; R. G. T. Zegers; Sam M. Austin; D. Bazin; B. A. Brown; C. Caesar; A. L. Cole; J. M. Deaven; N. Ferrante; C. J. Guess; G. W. Hitt; R. Meharchand; F. Montes; J. Palardy; A. Prinke; L. A. Riley; H. Sakai; M. Scott; A. Stolz; L. Valdez; K. Yako

Collaboration


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R. G. T. Zegers

Michigan State University

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Sam M. Austin

Michigan State University

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B. A. Brown

Michigan State University

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C. J. Guess

Michigan State University

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D. Bazin

Michigan State University

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G. Perdikakis

Central Michigan University

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R. Meharchand

Michigan State University

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A. L. Cole

Michigan State University

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A. Prinke

Michigan State University

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M. Scott

Michigan State University

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