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Your search keyword '"Peters E. E."' showing total 6 results
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6 results on '"Peters E. E."'

1. Firm spin and parity assignments for high-lying, low-spin levels in stable Si isotopes

Author

Sinclair, J., Scheck, M., Finch, S. W., Friman-Gayer, U., Tornow, W., Battaglia, G., Beck, T., Chapman, R., Chishti, M. M. R., Fransen, Ch, Gonzales, R., Hoemann, E., Isaak, J., Janssens, R. V. F., Jaroszynski, D. A., Johnson, S., Jones, M. D., Keatings, J. M., Kelly, N., Kleemann, J., Little, D., Loeher, B., Mashtakov, K., Muescher, M., O'Donnell, D., Papst, O., Peters, E. E., Savran, D., Schilling, M., Schwengner, R., Spagnoletti, P., Spieker, M., Werner, V, Wilhelmy, J., Wieland, O., Yates, S. W., Zilges, A., Sinclair, J., Scheck, M., Finch, S. W., Friman-Gayer, U., Tornow, W., Battaglia, G., Beck, T., Chapman, R., Chishti, M. M. R., Fransen, Ch, Gonzales, R., Hoemann, E., Isaak, J., Janssens, R. V. F., Jaroszynski, D. A., Johnson, S., Jones, M. D., Keatings, J. M., Kelly, N., Kleemann, J., Little, D., Loeher, B., Mashtakov, K., Muescher, M., O'Donnell, D., Papst, O., Peters, E. E., Savran, D., Schilling, M., Schwengner, R., Spagnoletti, P., Spieker, M., Werner, V, Wilhelmy, J., Wieland, O., Yates, S. W., and Zilges, A.

Abstract

A natural silicon target was investigated in a natSi photon-scattering experiment with fully linearlypolarised, quasi-monochromatic. rays in the entrance channel. The mean photon energies used were E = 9.33, 9.77, 10.17, 10.55, 10.93, and 11.37 MeV, and the relative energy spread (full width at half maximum) of the incident beam was.E. 3.5-4 %. The observed angular distributions for the ground-state decay allow firm spin and parity assignments for several levels of the stable even-even silicon isotopes.

Published
2020

2. Delta K=0 M1 Excitation Strength of the Well-Deformed Nucleus Dy-164 from K Mixing

Author

Beck, T., Werner, V, Pietralla, N., Bhike, M., Cooper, N., Friman-Gayer, U., Isaak, J., Jolos, R., V, Kleemann, J., Papst, O., Tornow, W., Bernards, C., Crider, B. P., Ilieva, R. S., Loher, B., Mihai, C., Naqvi, F., Pascu, S., Peters, E. E., Prados-Estevez, F. M., Ross, T. J., Savran, D., Vanhoy, J. R., Zilges, A., Beck, T., Werner, V, Pietralla, N., Bhike, M., Cooper, N., Friman-Gayer, U., Isaak, J., Jolos, R., V, Kleemann, J., Papst, O., Tornow, W., Bernards, C., Crider, B. P., Ilieva, R. S., Loher, B., Mihai, C., Naqvi, F., Pascu, S., Peters, E. E., Prados-Estevez, F. M., Ross, T. J., Savran, D., Vanhoy, J. R., and Zilges, A.

Abstract

The size of a Delta K = 0 M1 excitation strength has been determined for the first time in a predominantly axially deformed even-even nucleus. It has been obtained from the observation of a rare K-mixing situation between two close-lying J(pi) = 1(+) states of the nucleus Dy-164 with components characterized by intrinsic projection quantum numbers K = 0 and K = 1. Nuclear resonance fluorescence induced by quasimonochromatic linearly polarized gamma-ray beams provided evidence for K mixing of the 1(+) states at 3159.1(3) and 3173.6(3) keV in excitation energy from their gamma-decay branching ratios into the ground-state band. The Delta K = 0 transition strength of B(M1;0(1)(+) -> 1(K=0)(+) = 0.008(1)mu(2)(N) was inferred from a mixing analysis of their M1 transition rates into the ground-state band. It is in agreement with predictions from the quasiparticle phonon nuclear model. This determination represents first experimental information on the M1 excitation strength of a nuclear quantum state with a negative R-symmetry quantum number.

Published
2020

3. Firm spin and parity assignment for high-lying low-spin levels in stable Si isotopes

Author

Sinclair, J., Scheck, M., Finch, S. W., Krishichayan, F., Gayer, U., Tornow, W., Battaglio, G., Beck, T., Chapman, R., Chishti, M. M. R., Fransen, C., Gonzales, R., Hoemann, E., Isaak, J., Janssens, R. V. F., Jaroszynski, D. A., Johnson, S., Jones, M. D., Keatings, J. M., Kelly, N., Kleemann, J., Little, D., Löher, B., Mashtakov, K. R., Müscher, M., O'Donnell, D., Papst, O., Peters, E. E., Savran, D., Schilling, P., (0000-0002-7620-8882) Schwengner, R., Spagnoletti, P., Spieker, M., Werner, V., Wilhemy, J., Wieland, O., Yates, S. W., Zilges, A., Sinclair, J., Scheck, M., Finch, S. W., Krishichayan, F., Gayer, U., Tornow, W., Battaglio, G., Beck, T., Chapman, R., Chishti, M. M. R., Fransen, C., Gonzales, R., Hoemann, E., Isaak, J., Janssens, R. V. F., Jaroszynski, D. A., Johnson, S., Jones, M. D., Keatings, J. M., Kelly, N., Kleemann, J., Little, D., Löher, B., Mashtakov, K. R., Müscher, M., O'Donnell, D., Papst, O., Peters, E. E., Savran, D., Schilling, P., (0000-0002-7620-8882) Schwengner, R., Spagnoletti, P., Spieker, M., Werner, V., Wilhemy, J., Wieland, O., Yates, S. W., and Zilges, A.

Abstract

A natural silicon target was investigated in a natSi(gamma,gamma' ) photon-scattering experiment using fully polarised, quasi-monochromatic gamma rays in the entrance channel. The mean photon energies used were = 9.33, 9.77, 10.17, 10.55, 10.93, and 11.37 MeV, while the relative energy spread (Full Width Half Maximum) of the incident beam amounts to dE / E ~ 3.5 - 4 %. The observed angular distribution in the ground-state decay channel allows to propose a firm spin and parity assignment for several levels of the stable even-even silicon isotopes.

Published
2020

4. Firm spin and parity assignments for high-lying, low-spin levels in stable Si isotopes

Author

Sinclair, J., Scheck, M., Finch, S. W., Friman-Gayer, U., Tornow, W., Battaglia, G., Beck, T., Chapman, R., Chishti, M. M. R., Fransen, Ch, Gonzales, R., Hoemann, E., Isaak, J., Janssens, R. V. F., Jaroszynski, D. A., Johnson, S., Jones, M. D., Keatings, J. M., Kelly, N., Kleemann, J., Little, D., Loeher, B., Mashtakov, K., Muescher, M., O'Donnell, D., Papst, O., Peters, E. E., Savran, D., Schilling, M., Schwengner, R., Spagnoletti, P., Spieker, M., Werner, V, Wilhelmy, J., Wieland, O., Yates, S. W., Zilges, A., Sinclair, J., Scheck, M., Finch, S. W., Friman-Gayer, U., Tornow, W., Battaglia, G., Beck, T., Chapman, R., Chishti, M. M. R., Fransen, Ch, Gonzales, R., Hoemann, E., Isaak, J., Janssens, R. V. F., Jaroszynski, D. A., Johnson, S., Jones, M. D., Keatings, J. M., Kelly, N., Kleemann, J., Little, D., Loeher, B., Mashtakov, K., Muescher, M., O'Donnell, D., Papst, O., Peters, E. E., Savran, D., Schilling, M., Schwengner, R., Spagnoletti, P., Spieker, M., Werner, V, Wilhelmy, J., Wieland, O., Yates, S. W., and Zilges, A.

Abstract

A natural silicon target was investigated in a natSi photon-scattering experiment with fully linearlypolarised, quasi-monochromatic. rays in the entrance channel. The mean photon energies used were E = 9.33, 9.77, 10.17, 10.55, 10.93, and 11.37 MeV, and the relative energy spread (full width at half maximum) of the incident beam was.E. 3.5-4 %. The observed angular distributions for the ground-state decay allow firm spin and parity assignments for several levels of the stable even-even silicon isotopes.

Published
2020

5. Delta K=0 M1 Excitation Strength of the Well-Deformed Nucleus Dy-164 from K Mixing

Author

Beck, T., Werner, V, Pietralla, N., Bhike, M., Cooper, N., Friman-Gayer, U., Isaak, J., Jolos, R., V, Kleemann, J., Papst, O., Tornow, W., Bernards, C., Crider, B. P., Ilieva, R. S., Loher, B., Mihai, C., Naqvi, F., Pascu, S., Peters, E. E., Prados-Estevez, F. M., Ross, T. J., Savran, D., Vanhoy, J. R., Zilges, A., Beck, T., Werner, V, Pietralla, N., Bhike, M., Cooper, N., Friman-Gayer, U., Isaak, J., Jolos, R., V, Kleemann, J., Papst, O., Tornow, W., Bernards, C., Crider, B. P., Ilieva, R. S., Loher, B., Mihai, C., Naqvi, F., Pascu, S., Peters, E. E., Prados-Estevez, F. M., Ross, T. J., Savran, D., Vanhoy, J. R., and Zilges, A.

Abstract

The size of a Delta K = 0 M1 excitation strength has been determined for the first time in a predominantly axially deformed even-even nucleus. It has been obtained from the observation of a rare K-mixing situation between two close-lying J(pi) = 1(+) states of the nucleus Dy-164 with components characterized by intrinsic projection quantum numbers K = 0 and K = 1. Nuclear resonance fluorescence induced by quasimonochromatic linearly polarized gamma-ray beams provided evidence for K mixing of the 1(+) states at 3159.1(3) and 3173.6(3) keV in excitation energy from their gamma-decay branching ratios into the ground-state band. The Delta K = 0 transition strength of B(M1;0(1)(+) -> 1(K=0)(+) = 0.008(1)mu(2)(N) was inferred from a mixing analysis of their M1 transition rates into the ground-state band. It is in agreement with predictions from the quasiparticle phonon nuclear model. This determination represents first experimental information on the M1 excitation strength of a nuclear quantum state with a negative R-symmetry quantum number.

Published
2020

6. Emerging collectivity from the nuclear structure of Xe 132: Inelastic neutron scattering studies and shell-model calculations

Author

Peters, E. E., Stuchbery, Andrew, Chakraborty, A., Crider, B. P., Ashley, S. F., Kumar, A., McEllistrem, M. T., Prados-Estevez, F. M., Yates, S.W., Peters, E. E., Stuchbery, Andrew, Chakraborty, A., Crider, B. P., Ashley, S. F., Kumar, A., McEllistrem, M. T., Prados-Estevez, F. M., and Yates, S.W.

Abstract

Inelastic neutron scattering was used to study the low-lying nuclear structure of 132Xe. A comprehensive level scheme is presented, as well as new level lifetimes, multipole mixing ratios, branching ratios, and transition probabilities. Comparisons of these data as well as previously measured E2 strengths and g factors are made with new shell-model calculations for 132, 134, 136 Xe to explore the emergence of collectivity in the Xe isotopes with N<82 near the closed shell.

Published
2019

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