Direct Measurement of the [Formula presented] Ratio in [Formula presented] Electron Capture

P. A. Voytas; C. Ternovan; Massimiliano Galeazzi; D. McCammon; J. J. Kolata; P. Santi; D. Peterson; V. Guimarães; F. D. Becchetti; M. Y. Lee; T. W. O'Donnell; D. A. Roberts; S. Shaheen; S. Shaheen

doi:10.1103/PhysRevLett.88.012501

Direct Measurement of the [Formula presented] Ratio in [Formula presented] Electron Capture

P. A. Voytas, C. Ternovan, Massimiliano Galeazzi, D. McCammon, J. J. Kolata, P. Santi, D. Peterson, V. Guimarães, F. D. Becchetti, M. Y. Lee, T. W. O'Donnell, D. A. Roberts, S. Shaheen, S. Shaheen

Research output: Contribution to journal › Article

Abstract

The ratio of [Formula presented]- to [Formula presented]-shell electron captures in light nuclei is particularly sensitive to electron overlap and exchange effects. Calculations of these effects in [Formula presented] disagree by more than [Formula presented]. We report a measurement of the [Formula presented] ratio in [Formula presented], using a cryogenic microcalorimeter which clearly separates [Formula presented]- and [Formula presented]-shell captures. The obtained [Formula presented] ratio of 0.040(6) is less than half that of existing predictions for free [Formula presented]. The discrepancy is likely due to in-medium effects distorting the [Formula presented]-shell electron orbitals.

Original language	English (US)
Number of pages	1
Journal	Physical Review Letters
Volume	88
Issue number	1
DOIs	https://doi.org/10.1103/PhysRevLett.88.012501
State	Published - Jan 1 2002
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy(all)

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Voytas, P. A., Ternovan, C., Galeazzi, M., McCammon, D., Kolata, J. J., Santi, P., Peterson, D., Guimarães, V., Becchetti, F. D., Lee, M. Y., O'Donnell, T. W., Roberts, D. A., Shaheen, S., & Shaheen, S. (2002). Direct Measurement of the [Formula presented] Ratio in [Formula presented] Electron Capture. Physical Review Letters, 88(1). https://doi.org/10.1103/PhysRevLett.88.012501

Direct Measurement of the [Formula presented] Ratio in [Formula presented] Electron Capture. / Voytas, P. A.; Ternovan, C.; Galeazzi, Massimiliano; McCammon, D.; Kolata, J. J.; Santi, P.; Peterson, D.; Guimarães, V.; Becchetti, F. D.; Lee, M. Y.; O'Donnell, T. W.; Roberts, D. A.; Shaheen, S.; Shaheen, S.

In: Physical Review Letters, Vol. 88, No. 1, 01.01.2002.

Research output: Contribution to journal › Article

Voytas, P. A. ; Ternovan, C. ; Galeazzi, Massimiliano ; McCammon, D. ; Kolata, J. J. ; Santi, P. ; Peterson, D. ; Guimarães, V. ; Becchetti, F. D. ; Lee, M. Y. ; O'Donnell, T. W. ; Roberts, D. A. ; Shaheen, S. ; Shaheen, S. / Direct Measurement of the [Formula presented] Ratio in [Formula presented] Electron Capture. In: Physical Review Letters. 2002 ; Vol. 88, No. 1.

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abstract = "The ratio of [Formula presented]- to [Formula presented]-shell electron captures in light nuclei is particularly sensitive to electron overlap and exchange effects. Calculations of these effects in [Formula presented] disagree by more than [Formula presented]. We report a measurement of the [Formula presented] ratio in [Formula presented], using a cryogenic microcalorimeter which clearly separates [Formula presented]- and [Formula presented]-shell captures. The obtained [Formula presented] ratio of 0.040(6) is less than half that of existing predictions for free [Formula presented]. The discrepancy is likely due to in-medium effects distorting the [Formula presented]-shell electron orbitals.",

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AU - Kolata, J. J.

AU - Santi, P.

AU - Peterson, D.

AU - Guimarães, V.

AU - Becchetti, F. D.

AU - Lee, M. Y.

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