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Start Over Author "Mrazek, J." Journal physical review letters
9 results on '"Mrazek, J."'

1. Unveiling the Intruder Deformed02+State inSi34

Author

Rotaru, F., primary, Negoita, F., additional, Grévy, S., additional, Mrazek, J., additional, Lukyanov, S., additional, Nowacki, F., additional, Poves, A., additional, Sorlin, O., additional, Borcea, C., additional, Borcea, R., additional, Buta, A., additional, Cáceres, L., additional, Calinescu, S., additional, Chevrier, R., additional, Dombrádi, Zs., additional, Daugas, J. M., additional, Lebhertz, D., additional, Penionzhkevich, Y., additional, Petrone, C., additional, Sohler, D., additional, Stanoiu, M., additional, and Thomas, J. C., additional

Published
2012
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2. Prolate-Spherical Shape Coexistence atN=28inS44

Author

Force, C., primary, Grévy, S., additional, Gaudefroy, L., additional, Sorlin, O., additional, Cáceres, L., additional, Rotaru, F., additional, Mrazek, J., additional, Achouri, N. L., additional, Angélique, J. C., additional, Azaiez, F., additional, Bastin, B., additional, Borcea, R., additional, Buta, A., additional, Daugas, J. M., additional, Dlouhy, Z., additional, Dombrádi, Zs., additional, De Oliveira, F., additional, Negoita, F., additional, Penionzhkevich, Y., additional, Saint-Laurent, M. G., additional, Sohler, D., additional, Stanoiu, M., additional, Stefan, I., additional, Stodel, C., additional, and Nowacki, F., additional

Published
2010
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3. Measurement of the 20 and 90 keV Resonances in theO18(p,α)N15Reaction via the Trojan Horse Method

Author

La Cognata, M., primary, Spitaleri, C., additional, Mukhamedzhanov, A. M., additional, Irgaziev, B., additional, Tribble, R. E., additional, Banu, A., additional, Cherubini, S., additional, Coc, A., additional, Crucillà, V., additional, Goldberg, V. Z., additional, Gulino, M., additional, Kiss, G. G., additional, Lamia, L., additional, Mrazek, J., additional, Pizzone, R. G., additional, Puglia, S. M. R., additional, Rapisarda, G. G., additional, Romano, S., additional, Sergi, M. L., additional, Tabacaru, G., additional, Trache, L., additional, Trzaska, W., additional, and Tumino, A., additional

Published
2008
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4. Collapse of theN=28Shell Closure inS42i

Author

Bastin, B., primary, Grévy, S., additional, Sohler, D., additional, Sorlin, O., additional, Dombrádi, Zs., additional, Achouri, N. L., additional, Angélique, J. C., additional, Azaiez, F., additional, Baiborodin, D., additional, Borcea, R., additional, Bourgeois, C., additional, Buta, A., additional, Bürger, A., additional, Chapman, R., additional, Dalouzy, J. C., additional, Dlouhy, Z., additional, Drouard, A., additional, Elekes, Z., additional, Franchoo, S., additional, Iacob, S., additional, Laurent, B., additional, Lazar, M., additional, Liang, X., additional, Liénard, E., additional, Mrazek, J., additional, Nalpas, L., additional, Negoita, F., additional, Orr, N. A., additional, Penionzhkevich, Y., additional, Podolyák, Zs., additional, Pougheon, F., additional, Roussel-Chomaz, P., additional, Saint-Laurent, M. G., additional, Stanoiu, M., additional, Stefan, I., additional, Nowacki, F., additional, and Poves, A., additional

Published
2007
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5. Enhanced Core Polarization inNi70andZn74

Author

Perru, O., primary, Sorlin, O., additional, Franchoo, S., additional, Azaiez, F., additional, Bouchez, E., additional, Bourgeois, C., additional, Chatillon, A., additional, Daugas, J. M., additional, Dlouhy, Z., additional, Dombrádi, Zs., additional, Donzaud, C., additional, Gaudefroy, L., additional, Grawe, H., additional, Grévy, S., additional, Guillemaud-Mueller, D., additional, Hammache, F., additional, Ibrahim, F., additional, Le Coz, Y., additional, Lukyanov, S. M., additional, Matea, I., additional, Mrazek, J., additional, Nowacki, F., additional, Penionzhkevich, Yu.-E., additional, de Oliveira Santos, F., additional, Pougheon, F., additional, Saint-Laurent, M. G., additional, Sletten, G., additional, Stanoiu, M., additional, Stodel, C., additional, Theisen, Ch., additional, and Verney, D., additional

Published
2006
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6. Unveiling the Intruder Deformed O+2 State in 34Si.

Author

Rotaru, F., Negoita, F., Grévy, S., Mrazek, J., Lukyanov, S., Nowacki, F., Poves, A., Sorlin, O., Borcea, C., Borcea, R., Buta, A., Cáceres, L., Calinescu, S., Chevrier, R., Dombrádi, Zs., Daugas, J. M., Lebhertz, D., Penionzhkevich, Y., Petrone, C., and Sohler, D.

Subjects
*ENERGY levels (Quantum mechanics), *NUCLEAR facilities, *HALF-life (Nuclear physics), *MAGNETIC monopoles, *RADIATIVE transitions, *NUCLEAR shell theory
Abstract

The O+2 state in 34Si has been populated at the GANIL-LISE3 facility through the &bgr; decay of a newly discovered 1+ isomer in 34Al of 26(1) ms half-life. The simultaneous detection of e+ e- pairs allowed the determination of the excitation energy E(0+2) = 2719(3) keV and the half-life T1/2 = 19.4(7) ns, from which an electric monopole strength of &rgr;2(E0) = 13.0(0.9) X 10-3 was deduced. The 2+1 state is observed to decay both to the 0+1 ground state and to the newly observed 0+2 state [via a 607(2) keV transition] with a ratio R(2+1 → 0+1"/2+1 → 0+2) = 1380(717). Gathering all information, a weak mixing with the 0+1 and a large deformation parameter of &bgr; = 0.29(4) are found for the 0+2 state, in good agreement with shell model calculations using a new SDPF-U-MIX interaction allowing np-nh excitations across the N = 20 shell gap. [ABSTRACT FROM AUTHOR]

Published
2012
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7. Unveiling the intruder deformed 02(+) state in 34Si.

Author

Rotaru F, Negoita F, Grévy S, Mrazek J, Lukyanov S, Nowacki F, Poves A, Sorlin O, Borcea C, Borcea R, Buta A, Cáceres L, Calinescu S, Chevrier R, Dombrádi Z, Daugas JM, Lebhertz D, Penionzhkevich Y, Petrone C, Sohler D, Stanoiu M, and Thomas JC

Abstract

The 02(+) state in 34Si has been populated at the GANIL-LISE3 facility through the β decay of a newly discovered 1(+) isomer in 34Al of 26(1) ms half-life. The simultaneous detection of e(+)e(-) pairs allowed the determination of the excitation energy E(02(+))=2719(3)  keV and the half-life T(1/2)=19.4(7) ns, from which an electric monopole strength of ρ(2)(E0)=13.0(0.9)×10(-3) was deduced. The 2(1)(+) state is observed to decay both to the 0(1)(+) ground state and to the newly observed 0(2)(+) state [via a 607(2) keV transition] with a ratio R(2(1)(+)→0(1)(+)/2(1)(+)→0(2)(+))=1380(717). Gathering all information, a weak mixing with the 0(1)(+) and a large deformation parameter of β=0.29(4) are found for the 0(2)(+) state, in good agreement with shell model calculations using a new SDPF-U-MIX interaction allowing np-nh excitations across the N=20 shell gap.

Published
2012
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8. Measurement of the 20 and 90 keV resonances in the 18O(p,alpha)15N reaction via the Trojan horse method.

Author

La Cognata M, Spitaleri C, Mukhamedzhanov AM, Irgaziev B, Tribble RE, Banu A, Cherubini S, Coc A, Crucillà V, Goldberg VZ, Gulino M, Kiss GG, Lamia L, Mrazek J, Pizzone RG, Puglia SM, Rapisarda GG, Romano S, Sergi ML, Tabacaru G, Trache L, Trzaska W, and Tumino A

Abstract

The 18O(p,alpha)15N reaction is of primary importance in several astrophysical scenarios, including fluorine nucleosynthesis inside asymptotic giant branch stars as well as oxygen and nitrogen isotopic ratios in meteorite grains. Thus the indirect measurement of the low energy region of the 18O(p,alpha)15N reaction has been performed to reduce the nuclear uncertainty on theoretical predictions. In particular the strength of the 20 and 90 keV resonances has been deduced and the change in the reaction rate evaluated.

Published
2008
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9. Collapse of the N=28 shell closure in (42)Si.

Author

Bastin B, Grévy S, Sohler D, Sorlin O, Dombrádi Z, Achouri NL, Angélique JC, Azaiez F, Baiborodin D, Borcea R, Bourgeois C, Buta A, Bürger A, Chapman R, Dalouzy JC, Dlouhy Z, Drouard A, Elekes Z, Franchoo S, Iacob S, Laurent B, Lazar M, Liang X, Liénard E, Mrazek J, Nalpas L, Negoita F, Orr NA, Penionzhkevich Y, Podolyák Z, Pougheon F, Roussel-Chomaz P, Saint-Laurent MG, Stanoiu M, Stefan I, Nowacki F, and Poves A

Abstract

The energies of the excited states in very neutron-rich (42)Si and (41,43)P have been measured using in-beam gamma-ray spectroscopy from the fragmentation of secondary beams of (42,44)S at 39A MeV. The low 2(+) energy of (42)Si, 770(19) keV, together with the level schemes of (41,43)P, provides evidence for the disappearance of the Z=14 and N=28 spherical shell closures, which is ascribed mainly to the action of proton-neutron tensor forces. New shell model calculations indicate that (42)Si is best described as a well-deformed oblate rotor.

Published
2007
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