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279 results on '"Lawrie, E. A."'

1. First observation of rotational bands in the nucleus 231U

Author

Roux, D. G., Bark, R. A., Lawrie, E. A., Lawrie, J. J., Ntshangase, S. S., Dinoko, T. S., Easton, J. L., Jones, P., Kheswa, B. V., Khumalo, N. A., Majola, S. N. T., Masiteng, L. P., Negi, D., Noncolela, S. P., Ndayishimye, J., Sharpey-Schafer, J. F., Shirinda, O., and Uwitonze, P. C.

Published
2024
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3. Gamma-ray emission in proton-induced nuclear reactions on natC and Mylar targets over the incident energy range of Ep = 30-200 MeV. Astrophysical implications

Author

Rahma, Y., Ouichaoui, S., Kiener, J., Lawrie, E. A., Lawrie, J. J., Tatischeff, V., Belhout, A., Moussa, D., Yahia-Cherif, W., Benhabiles-Mezhoud, H., Bucher, T. D., Dinoko, T. R. S., Chafa, A., Conradie, J. L., Damache, S., Debabi, M., Deloncle, I., Easton, J. L., Fouka, M., Hamadache, C., Hammache, F., Jones, P., Kheswa, B. V., Khumalo, N. A., Lamula, T., Majola, S. N. T., Ndayishimye, J., Negi, D., Noncolela, S. P., Ouziane, S., Papka, P., Peterson, S, Raju, M. Kumar, Ramanathan, V., Rebeiro, B. M., de Séréville, N., Sharpey-Schafer, J. F., Shirinda, O., Wiedeking, M., and Wyngaardt, S.

Subjects
Nuclear Experiment
Abstract

We have measured the gamma-ray line production cross sections in proton-induced nuclear reactions on various target nuclei abundant in astrophysical sites over the incident energy range of Ep = 30 - 200 MeV. We carried out experimental campaigns in joint collaboration at the K = 200 cyclotron of iThemba LABS using a high-energy resolution, high-efficiency detection array composed of 8 Compton-suppressed clover detectors comprising 32 HP-Ge crystals for recording the gamma-ray spectra. In the current paper, we focus on de-excitation lines produced in proton irradiations of natC and Mylar targets. In particular, on the prominent 4.439 and 6.129 MeV lines of $^{12}$C and $^{16}$O which are among the strongest lines emitted in solar flares and in interactions of low-energy cosmic rays with the gas and dust of the inner galaxy. We report new gamma-ray production experimental cross section data for ten nuclear lines that we compare to previous low-energy data sets from the literature, to the predictions of the TALYS code of modern nuclear reactions and to a semi-empirical compilation. In first approach, performing calculations with default input parameters of TALYS we observed substantial deviations between the predicted cross sections and experimental data. Then, using modified optical model potential and nuclear level deformation parameters as input data we generated theoretical excitation functions for the above two main lines fully consistent with experimental data. In contrast, the experimental data sets for the other eight analyzed lines from the two proton-irradiated targets exhibit significant deviations with the predicted cross section values. We also report line-shape experimental data for the line complex observed at $E_g$ = 4.44 MeV in irradiations of the two targets. Finally, we emphasize the astrophysical implications of our results., Comment: 44 pages, 7 tables, 13 figures

Published
2022
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4. Evidence against the wobbling nature of low-spin bands in $^{135}$Pr

Author

Lv, B. F., Petrache, C. M., Lawrie, E. A., Guo, S., Astier, A., Dupont, E., Zheng, K. K., Ong, H. J., Wang, J. G., Zhou, X. H., Sun, Z. Y., Greenlees, P., Badran, H., Calverley, T., Cox, D. M., Grahn, T., Hilton, J., Julin, R., Juutinen, S., Konki, J., Pakarinen, J., Papadakis, P., Partanen, J., Rahkila, P., Ruotsalainen, P., Sandzelius, M., Saren, J., Scholey, C., Sorri, J., Stolze, S., Uusitalo, J., Cederwall, B., Ertoprak, A., Liu, H., Kuti, I., Timar, J., Tucholski, A., Srebrny, J., and Andreoiu, C.

Subjects
Nuclear Experiment
Abstract

The electromagnetic character of the $\Delta I=1$ transitions connecting the one- to zero-phonon and the two- to one-phonon wobbling bands should be dominated by an $E2$ component, due to the collective motion of the entire nuclear charge. In the present work it is shown, based on combined angular correlation and linear polarization measurements, that the mixing ratios of all analyzed connecting transitions between low-lying bands in $^{135}$Pr interpreted as zero-, one-, and two-phonon wobbling bands, have absolute values smaller than one. This indicates predominant $M1$ magnetic character, which is incompatible with the proposed wobbling nature. All experimental observables are instead in good agreement with quasiparticle-plus-triaxial-rotor model calculations, which describe the bands as resulting from a rapid re-alignment of the total angular momentum from the short to the intermediate nuclear axis.

Published
2021
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5. Probing the nature of the conjectured low-spin wobbling bands in atomic nuclei

Author

Guo, S., Zhou, X. H., Petrache, C. M., Lawrie, E. A., Mthembu, S., Fang, Y. D., Wu, H. Y., Wang, H. L., Meng, H. Y., Li, G. S., Qiang, Y. H., Wang, J. G., Liu, M. L., Zheng, Y., Ding, B., Zhang, W. Q., Rohilla, A., Mukhi, K. R., Yang, Y. Y., Ong, H. J., Ma, J. B., Xu, S. W., Bai, Z., Fan, H. L., Huang, J. F., Li, J. H., Xu, J. H., Lv, B. F., Hua, W., Gan, Z. G., and Zhang, Y. H.

Subjects
Nuclear Theory, Nuclear Experiment
Abstract

Precession is a unique motion in which the orientation of the rotational axis of a rotating body is not fixed but moving, and it generally exists in the Universe from giant stars through tiny atomic nuclei. In principle, the precession of an atomic nuclide can be approximately described as wobbling motion, arising from the coupling of a rotation and a harmonic vibration. Recently, a number of wobbling bands were reported at low spin, which violate the wobbling approximation that can be valid only at high spin. Here we explore the nature of the reported low-spin wobbling bands. Via a new experiment, we demonstrate that one such band in $^{187}$Au is generated by dominant single-particle excitation rather than by the excitation of a wobbling phonon. We point out that the imperfect research paradigm used previously would lead to unreliable identification of low-spin wobbling bands. Consequently, new experimental approaches should be developed to distinguish among the different excitation mechanisms that can give rise to the observed low-spin bands in odd-even nuclei.

Published
2020
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6. First candidates for {\gamma} vibrational bands built on the [505]11/2- neutron orbital in odd-A Dy isotopes

Author

Majola, S. N. T., Sithole, M. A., Mdletshe, L., Hartley, D., Timar, J., Nyako, B. M., Allmond, J. M., Bark, R. A., Beausang, C., Bianco, L., Bucher, T. D., Bvumbi, S. P., Carpenter, M. P., Chiara, C. J., Cooper, N., Cullen, D. M., Curien, D., Dinoko, T. S., Gall, B. J. P., Garrett, P. E., Greenlees, P. T., Hirvonen, J., Jakobsson, U., Jones, P. M., Julin, R., Juutinen, S., Ketelhut, S., Kheswa, B. V., Kondev, F. G., Korichi, A., Kulp, W. D., Lauritsen, T., Lawrie, E. A., Makhathini, L., Masiteng, P. L., Maqabuka, B., Mccutchan, E. A., Miller, D., Miller, S., Minkova, A., Msebi, L., Mthembu, S. H., Ndayishimye, J., Nieminen, P., Ngcobo, P. Z., Ntshangase, S. S., Orce, J. N., Peura, P., Rahkila, P., Redon, N., Riedinger, L. L., Riley, M. A., Roux, D. G., Ruotsalainen, P., Piot, J., Saren, J., Sharpey-Schafer, J. F., Scholey, C., Shirinda, O., Simpson, J., Sorri, J., Stefanescu, I., Stolze, S., Uusitalo, J., Wang, X., Werner, V., Wood, J. L., Yu, C. H., Zhu, S., and Zimba, G.

Subjects
Nuclear Experiment, Nuclear Theory
Abstract

Rotational structures have been measured using the Jurogam II and GAMMASPHERE arrays at low spin following the 155Gd({\alpha},2n)157Dy and 148Nd(12C, 5n)155Dy reactions at 25 and 65 MeV, respectively. We report high-K bands, which are conjectured to be the first candidates of a K{\pi}= 2+ {\gamma} vibrational band, built on the [505]11/2- neutron orbital, in both odd-A 155, 157Dy isotopes. The coupling of the first excited K=0+ states or the so-called \b{eta} vibrational bands at 661 and 676 keV in 154Dy and 156Dy to the [505]11/2- orbital, to produce a K{\pi}=11/2- band, was not observed in both 155Dy and 157Dy, respectively. The implication of these findings on the interpretation of the first excited 0+ states in the core nuclei 154Dy and 156Dy are also discussed., Comment: Published in Physical Rev C

Published
2020
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7. Spectroscopy of low spin states in 157Dy: Search for evidence of enhanced octupole correlations

Author

Majola, S. N. T., Bark, R. A., Bianco, L., Bucher, T. D., Bvumbi, S. P., Cullen, D. M., Garrett, P. E., Greenlees, P. T., Hartley, D., Hirvonen, J, Jakobsson, U., Jones, P. M., Julin, R., Juutinen, S., Ketelhut, S., Kheswa, B. V., Korichi, A., Lawrie, E. A., Masiteng, P. L., Maqabuka, B., Mdletshe, L., Minkova, A., Ndayishimye, J., Nieminen, P., Newman, R., Nyako, B. M., Ntshangase, S. S., Peura, P., Rahkila, P., Riedinger, L. L., Riley, M., Roux, D., Ruotsalainen, P., Saren, J., Sharpey-Schafer, J. F., Scholey, C., Shirinda, O., Sithole, A., Sorri, J., Stolze, S., Timar, J., Uusitalo, J., and Zimba, G.

Subjects
Nuclear Experiment, Nuclear Theory
Abstract

Low-spin states of 157Dy have been studied using the JUROGAM II array, following the 155Gd ({\alpha}, 2n) reaction at a beam energy of 25 MeV. The level scheme of 157Dy has been expanded with four new bands. Rotational structures built on the [523]5/2- and [402]3/2+ neutron orbitals constitute new additions to the level scheme as do many of the inter- and intra-band transitions. This manuscript also reports the observation of cross I- to (I-1)- and I- to (I-1)+ E1 dipole transitions inter-linking structures built on the [523]5/2- (band 5) and [402]3/2+ (band 7) neutron orbitals. These interlacing band structures are interpreted as the bands of parity doublets with simplex quantum number s = -i related to possible octupole correlations., Comment: Published in Physical Review C (2019)

Published
2020
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8. Measurement and analysis of nuclear $\gamma$-ray production cross sections in proton interactions with Mg, Si and Fe nuclei abundant in astrophysical sites over the incident energy range $E=30-66$ MeV

Author

Yahia-Cherif, W., Ouichaoui, S., Kiener, J., Lawrie, E. A., Lawrie, J. J., Tatischeff, V., Belhout, A., Moussa, D., Papka, P., Benhabiles, H., Bucher, T. D., Chafa, A., Conradie, J. L., Damache, S., Debabi, M., Deloncle, I., Easton, J. L., Hamadache, C., Hammache, F., Jones, P., Kheswa, B. V., Khumalo, N. A., Lamula, T., Majola, S. N. T., Ndayishimye, J., Negi, D., Noncolela, S. P., de Séréville, N., Sharpey-Schafer, J. F., Shirinda, O., Wiedeking, M., and Wyngaardt, S.

Subjects
Nuclear Experiment, Astrophysics - Solar and Stellar Astrophysics
Abstract

Gamma-ray production cross section excitation functions have been measured for $30$, $42$, $54$ and $66$ MeV proton beams accelerated onto targets of astrophysical interest, $^{nat}$C, C + O (Mylar), $^{nat}$Mg, $^{nat}$Si and $^{56}$Fe, at the Sector Separated Cyclotron (SSC) of iThemba LABS (near Cape Town, South Africa). The AFRODITE array equipped with 8 Compton suppressed HPGe clover detectors was used to record $\gamma$-ray data. For known, intense $\gamma$-ray lines the previously reported experimental data measured up to $E_{p}\simeq$ $25$ MeV at the Washington and Orsay tandem accelerators were extended to higher proton energies. Our experimental data for the last 3 targets are reported here and discussed with respect to previous data and the Murphy \textit{et al.} compilation [ApJS 183, 142 (2009)], as well as to predictions of the nuclear reaction code TALYS. The overall agreement between theory and experiment obtained in first-approach calculations using default input parameters of TALYS has been appreciably improved by using modified optical model potential (OMP), deformation, and level density parameters. The OMP parameters have been extracted from theoretical fits to available experimental elastic/inelastic nucleon scattering angular distribution data by means of the coupled-channels reaction code OPTMAN. Experimental data for several new $\gamma$-ray lines are also reported and discussed. The astrophysical implications of our results are emphasised., Comment: 22 pages, 10 figures, five tables; regular article submitted to Phys Rev C

Published
2020
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9. Diversity of shapes and rotations in the gamma-soft 130Ba nucleus: first observation of a t-band in the A=130 mass region

Author

Petrache, C. M., Walker, P. M., Guo, S., Chen, Q. B., Frauendorf, S., Liu, Y. X., Wyss, R. A., Mengoni, D., Qiang, Y., Astier, A., Dupont, E., Li, R., Lv, B. F., Zheng, K. K., Bazzacco, D., Boso, A., Goasduff, A., Recchia, 8 F., Testov, D., Galtarossa, F., Jaworski, G., Napoli, D. R., Riccetto, S., Siciliano, M., Valiente-Dobon, J. J., Liu, M. L., Zhou, X. H., Wang, J. G., Andreoiu, C., Garcia, F. H., Ortner, K., Whitmore, K., Back, T., Cederwall, B., Lawrie, E. A., Kuti, I., Sohler, D., Timar, J., Marchlewski, T., Srebrny, J., and Tucholski, A.

Subjects
Nuclear Experiment, Nuclear Theory
Abstract

Several new bands have been identified in 130Ba, among which there is one with band-head spin 8+. Its properties are in agreement with the Fermi-aligned \nu h11/2^2 , 7/2+[523] \otimes 9/2-[514] Nilsson configuration. This is the first observation of a two-quasiparticle t-band in the A=130 mass region. The t-band is fed by a dipole band involving two additional h11/2 protons. The odd-spin partners of the proton and neutron S-bands and the ground-state band at high spins are also newly identified. The observed bands are discussed using several theoretical models, which strongly suggest the coexistence of prolate and oblate shapes polarized by rotation aligned two-proton and two-neutron configurations, as well as prolate collective rotations around axes with different orientations. With the new results, 130Ba presents one of the best and most complete sets of collective excitations that a gamma-soft nucleus can manifest at medium and high spins, revealing a diversity of shapes and rotations for the nuclei in the A = 130 mass region., Comment: 8 pages, 7 figures

Published
2019
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10. First observation of rotational bands in the nucleus $$^{231}$$U

Author

Roux, D. G., primary, Bark, R. A., additional, Lawrie, E. A., additional, Lawrie, J. J., additional, Ntshangase, S. S., additional, Dinoko, T. S., additional, Easton, J. L., additional, Jones, P., additional, Kheswa, B. V., additional, Khumalo, N. A., additional, Majola, S. N. T., additional, Masiteng, L. P., additional, Negi, D., additional, Noncolela, S. P., additional, Ndayishimye, J., additional, Sharpey-Schafer, J. F., additional, Shirinda, O., additional, and Uwitonze, P. C., additional

Published
2024
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11. Nuclear level densities and $\gamma$-ray strength functions of $^{87}\mathrm{Kr}$ -- First application of the Oslo Method in inverse kinematics

Author

Ingeberg, V. W., Siem, S., Wiedeking, M., Sieja, K., Bleuel, D. L., Brits, C. P., Bucher, T. D., Dinoko, T. S., Easton, J. L., Görgen, A., Guttormsen, M., Jones, P., Kheswa, B. V., Khumalo, N. A., Larsen, A. C., Lawrie, E. A., Lawrie, J. J., Majola, S. N. T., Malatji, K. L., Makhathini, L., Maqabuka, B., Negi, D., Noncolela, S. P., Papka, P., Sahin, E., Schwengner, R., Tveten, G. M., Zeiser, F., and Zikhali, B. R.

Subjects
Nuclear Experiment
Abstract

The $\gamma$-ray strength function ($\gamma$SF) and nuclear level density (NLD) have been extracted for the first time from inverse kinematic reactions with the Oslo Method. This novel technique allows measurements of these properties across a wide range of previously inaccessible nuclei. Proton-$\gamma$ coincidence events from the $\mathrm{d}(^{86}\mathrm{Kr}, \mathrm{p}\gamma)^{87}\mathrm{Kr}$ reaction were measured at iThemba LABS and the $\gamma$SF and NLD in $^{87}\mathrm{Kr}$ obtained. The low-energy region of the $\gamma$SF is compared to Shell Model calculations which suggest this region to be dominated by M1 strength. The $\gamma$SF and NLD are used as input parameters to Hauser-Feshbach calculations to constrain $(\mathrm{n},\gamma)$ cross sections of nuclei using the TALYS reaction code. These results are compared to $^{86}\mathrm{Kr}(n,\gamma)$ data from direct measurements., Comment: Submitted to EpJ A Letters

Published
2018
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12. First observation of band structure in As76 : Possible chirality and octupole correlations

Author

Xu, W. Z., primary, Sun, D. P., additional, Wang, S. Y., additional, Bark, R. A., additional, Hua, H., additional, Meng, J., additional, Zhang, S. Q., additional, Jones, P., additional, Wyngaardt, S. M., additional, Liu, C., additional, Wang, S., additional, Li, G. Y., additional, Mu, L., additional, Bai, H. F., additional, Xiao, X., additional, Li, Z. Q., additional, Zhang, N. B., additional, Jia, H., additional, Guo, R. J., additional, Han, X. C., additional, Qi, B., additional, Niu, C. Y., additional, Wang, C. G., additional, Lawrie, E. A., additional, Lawrie, J. J., additional, Sharpey-Schafer, J. F., additional, Wiedeking, M., additional, Majola, S. N. T., additional, Bucher, T. D., additional, Dinoko, T., additional, Maqabuka, B., additional, Makhathini, L., additional, Mdletshe, L., additional, Khumalo, N. A., additional, Shirinda, O., additional, and Sowazi, K., additional

Published
2024
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13. Nature of low-lying electric dipole resonance excitations in 74Ge

Author

Negi, D., Wiedeking, M., Lanza, E. G., Litvinova, E., Vitturi, A., Bark, R. A., Bernstein, L. A., Bleuel, D. L., Bvumbi, S., Bucher, T. D., Daub, B. H., Dinoko, T. S., Easton, J. L., Gorgen, A., Guttormsen, M., Jones, P., Kheswa, B. V., Khumalo, N. A., Larsen, A. C., Lawrie, E. A., Lawrie, J. J., Majola, S. N. T., Masiteng, L. P., Nchodu, M. R., Ndayishimye, J., Newman, R. T., Noncolela, S. P., Orce, J. N., Papka, P., Pellegri, L., Renstrøm, T., Roux, D. G., Schwengner, R., Shirinda, O., and Siem, S.

Subjects
Nuclear Experiment
Abstract

Isospin properties of dipole excitations in 74 Ge are investigated using the ({\alpha},{\alpha}'{\gamma}) reaction and compared to ({\gamma},{\gamma}) data. The results indicate that the dipole excitations in the energy region of 6 to 9 MeV adhere to the scenario of the recently found splitting of the region of dipole excitations into two separated parts: one at low energy, being populated by both isoscalar and isovector probes, and the other at high energy, excited only by the electromagnetic probe. Relativistic quasiparticle time blocking approximation (RQTBA) calculations show a reduction in the isoscalar E1 strength with an increase in excitation energy, which is consistent with the measurement., Comment: 7 pages, 7 figures

Published
2016
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14. Gamma ray production cross sections in proton induced reactions on natural Mg, Si and Fe targets over the proton energy range 30 up to 66 MeV

Author

Yahia-Chérif, W., Ouichaoui, S., Kiener, J., Tatischeff, V., Lawrie, E., Lawrie, J. J., Belhout, A., Benhabiles, H., Bucher, T. D., Chafa, A., Damache, S., Debabi, M., Deloncle, I., Easton, J. L., Hamadache, C., Hammache, F., Jones, P., Kheswa, B. V., Khumalo, N., Lamula, T., Majola, S. T. H., Negi, D., Ndayishimye, J., Noncolela, S. P., Moussa, D., Nchodu, R., Papka, P., de Sereville, N., Sharpey-Schafer, J. F., Shirinda, O., Wiedeking, M., and Wyngaardt, S.

Subjects
Nuclear Experiment
Abstract

Gamma-ray excitation functions have been measured for 30, 42, 54 and 66 MeV proton beams accelerated onto C + O (Mylar), Mg, Si, and Fe targets of astrophysical interest at the separate-sector cyclotron of iThemba LABS in Somerset West (Cape Town, South Africa). A large solid angle, high energy resolution detection system of the Eurogam type was used to record Gamma-ray energy spectra. Derived preliminary results of Gamma-ray line production cross sections for the Mg, Si and Fe target nuclei are reported and discussed. The current cross section data for known, intense Gamma-ray lines from these nuclei consistently extend to higher proton energies previous experimental data measured up to Ep ~ 25 MeV at the Orsay and Washington tandem accelerators. Data for new Gamma-ray lines observed for the first time in this work are also reported., Comment: 11 pages, 6 figures. IOP Institute of Physics Conference Nuclear Physics in Astrophysics VII, 28th EPF Nuclear Physics Divisional Conference, May 18-22 2015, York, UK

Published
2015

16. The first candidate for chiral nuclei in the $A\sim80$ mass region: $^{80}$Br

Author

Wang, S. Y., Qi, B., Liu, L., Zhang, S. Q., Hua, H., Li, X. Q., Chen, Y. Y., Zhu, L. H., Meng, J., Wyngaardt, S. M., Papka, P., Ibrahim, T. T., Bark, R. A., Datta, P., Lawrie, E. A., Lawrie, J. J., Majola, S. N. T., Masiteng, P. L., Mullins, S. M., Gál, J., Kalinka, G., Molnár, J., Nyakó, B. M., Timár, J., Juhász, K., and Schwengner, R.

Subjects
Nuclear Experiment, Nuclear Theory
Abstract

Excited states of $^{80}$Br have been investigated via the $^{76}$Ge($^{11}$B, $\alpha$3n) and $^{76}$Ge($^{7}$Li, 3n) reactions and a new $\Delta I$ = 1 band has been identified which resides $\sim$ 400 keV above the yrast band. Based on the experimental results and their comparison with the triaxial particle rotor model calculated ones, a chiral character of the two bands within the $\pi g_{9/2}\otimes \nu g_{9/2}$ configuration is proposed, which provides the first evidence for chirality in the $A\sim80$ region., Comment: 15 pages, 6 figures, accepted for publication in Physics Letters B

Published
2011
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17. First application of the Oslo method in inverse kinematics

Author

Ingeberg, V. W., Siem, S., Wiedeking, M., Sieja, K., Bleuel, D. L., Brits, C. P., Bucher, T. D., Dinoko, T. S., Easton, J. L., Görgen, A., Guttormsen, M., Jones, P., Kheswa, B. V., Khumalo, N. A., Larsen, A. C., Lawrie, E. A., Lawrie, J. J., Majola, S. N. T., Malatji, K. L., Makhathini, L., Maqabuka, B., Negi, D., Noncolela, S. P., Papka, P., Sahin, E., Schwengner, R., Tveten, G. M., Zeiser, F., and Zikhali, B. R.

Published
2020
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18. New collective structures in the 163Yb nucleus

Author

Sithole, M. A., Sharpey Schafer, J. F., Majola, S. N. T., Bucher, T. D., Dinoko, T. R. S., Ntshangase, S. S., Lawrie, E. A., Khumalo, N. A., Jongile, S., Mdletshe, L., Bark, R. A., Erasmus, N., Jones, P., Kheswa, B. V., Lawrie, J. J., Makhathini, L., Malatji, K. L., Maqabuka, B., Noncolela, S. P., Ndayishimye, J., Shirinda, O., Zikhali, B. R., and Masiteng, P. L.

Published
2019
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19. Chirality and octupole correlations in As74

Author

Xiao, X., primary, Wang, S. Y., additional, Liu, C., additional, Bark, R. A., additional, Meng, J., additional, Zhang, S. Q., additional, Qi, B., additional, Hua, H., additional, Jones, P., additional, Wyngaardt, S. M., additional, Wang, S., additional, Sun, D. P., additional, Li, Z. Q., additional, Zhang, N. B., additional, Jia, H., additional, Guo, R. J., additional, Han, X. C., additional, Mu, L., additional, Lu, X., additional, Xu, W. Z., additional, Niu, C. Y., additional, Wang, C. G., additional, Lawrie, E. A., additional, Lawrie, J. J., additional, Sharpey-Schafer, J. F., additional, Wiedeking, M., additional, Majola, S. N. T., additional, Bucher, T. D., additional, Dinoko, T., additional, Maqabuka, B., additional, Makhathini, L., additional, Mdletshe, L., additional, Khumalo, N. A., additional, Shirinda, O., additional, and Sowazi, K., additional

Published
2022
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20. Nuclear level density and γ -ray strength function of Ni63

Author

Ingeberg, V. W., primary, Jones, P., additional, Msebi, L., additional, Siem, S., additional, Wiedeking, M., additional, Avaa, A. A., additional, Chisapi, M. V., additional, Lawrie, E. A., additional, Malatji, K. L., additional, Makhathini, L., additional, Noncolela, S. P., additional, and Shirinda, O., additional

Published
2022
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22. Collective rotational bands at low excitation energy in Os186 : Vibrational and rotational degrees of freedom

Author

Mdletshe, L., primary, Yang, X. Q., additional, Lawrie, E. A., additional, Sithole, M. A., additional, Majola, S. N. T., additional, Ntshangase, S. S., additional, Sharpey-Schafer, J. F., additional, Lawrie, J. J., additional, Mthembu, S. H., additional, Bucher, T. D., additional, Msebi, L., additional, Bark, R. A., additional, Avaa, A. A., additional, Chisapi, M. V., additional, Jones, P., additional, Jongile, S., additional, Li, Z. P., additional, Makhathini, L., additional, Malatji, K. L., additional, Netshiya, A. A., additional, Shi, Z., additional, Song, B. Y., additional, Wang, L., additional, Xiang, J., additional, and Zhang, S. Q., additional

Published
2022
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23. Configurations of the low-lying states in Eu146

Author

Zeng, Q. B., primary, Guo, S., additional, Liu, Z., additional, Li, J. G., additional, Li, H. H., additional, Wang, J. G., additional, Zhang, Z. Y., additional, Ma, L., additional, Qiang, Y. H., additional, Huang, M. H., additional, Li, G. S., additional, Fang, Y. D., additional, Liu, M. L., additional, Ding, B., additional, Zheng, Y., additional, Li, J. H., additional, Lu, H. Y., additional, Zhang, W. Q., additional, Wang, K. L., additional, Liu, X.Y, additional, Huang, H., additional, Zeng, F. F., additional, Yu, X. H., additional, Rohilla, A., additional, Huang, J. F., additional, Fan, H. L., additional, Qi, C., additional, Yuan, C. X., additional, Petrache, C. M., additional, Lawrie, E. A., additional, Zuo, W., additional, Gan, Z. G., additional, and Zhou, X. H., additional

Published
2022
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24. Low-lying positive parity bands in 162Yb

Author

Mdletshe, L., Ntshangase, S. S., Sharpey-Schafer, J. F., Majola, S. N. T., Dinoko, T. R. S., Khumalo, N. A., Lawrie, E. A., Bark, R. A., Bucher, T. D., Erasmus, N., Jones, P., Jongile, S., Kheswa, B. V., Lawrie, J. J., Makhathini, L., Malatji, K. L., Maqabuka, B., Ndayishimye, J., Noncolela, S. P., Shirinda, O., and Sithole, M. A.

Published
2018
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25. Probing 93mMo Isomer Depletion with an Isomer Beam

Author

Guo, S., Ding, B., Zhou, X., Wu, Y., Wang, J., Xu, S., Fang, Y., Petrache, C., Lawrie, E., Qiang, Y., Yang, Y., Ong, H., Ma, J., Chen, J., Fang, F., Yu, Y., Lv, B., Zeng, F., Zeng, Q., Huang, H., Jia, Z., Jia, C., Liang, W., Li, Y., Huang, N., Liu, L., Zheng, Y., Zhang, W., Rohillla, A., Bai, Z., Jin, S., Wang, K., Duan, F., Yang, G., Li, J., Xu, J., Li, G., Liu, M., Liu, Z., Gan, Z., Wang, M., and Zhang, Y.

Subjects
Research group A. Pálffy – Division C. H. Keitel
Published
2022

26. Search for two-phonon octupole excitations in 146Gd

Author

Orce, J. N., Kumar Raju, M., Khumalo, N. A., Dinoko, T. S., Jones, P., Bark, R. A., Lawrie, E. A., Majola, S. N. T., Robledo, L. M., Rubio, B., Wiedeking, M., Easton, J., Khaleel, E. A., Kheswa, B. V., Kheswa, N., Herbert, M. S., Lawrie, J. J., Masiteng, P. L., Nchodu, M. R., Ndayishimye, J., Negi, D., Noncolela, S. P., Ntshangase, S. S., Papka, P., Roux, D. G., Shirinda, O., Sithole, P. S., and Yates, S. W.

Published
2016
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27. DSAM lifetime measurements for the chiral pair in 194Tl

Author

Masiteng, P. L., Pasternak, A. A., Lawrie, E. A., Shirinda, O., Lawrie, J. J., Bark, R. A., Bvumbi, S. P., Kheswa, N. Y., Lindsay, R., Lieder, E. O., Lieder, R. M., Madiba, T. E., Mullins, S. M., Murray, S. H. T., Ndayishimye, J., Ntshangase, S. S., Papka, P., and Sharpey-Schafer, J. F.

Published
2016
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28. First evidence of an octupole rotational band in Ge isotopes

Author

Wang, C. G., primary, Han, R., additional, Xu, C., additional, Hua, H., additional, Bark, R. A., additional, Zhang, S. Q., additional, Wang, S. Y., additional, Shneidman, T. M., additional, Zhou, S. G., additional, Meng, J., additional, Wyngaardt, S. M., additional, Dai, A. C., additional, Xu, F. R., additional, Li, X. Q., additional, Li, Z. H., additional, Ye, Y. L., additional, Jiang, D. X., additional, Li, C. G., additional, Niu, C. Y., additional, Chen, Z. Q., additional, Wu, H. Y., additional, Luo, D. W., additional, Wang, S., additional, Sun, D. P., additional, Liu, C., additional, Li, Z. Q., additional, Zhang, N. B., additional, Guo, R. J., additional, Jones, P., additional, Lawrie, E. A., additional, Lawrie, J. J., additional, Sharpey-Schafer, J. F., additional, Wiedeking, M., additional, Majola, S. N. T., additional, Bucher, T. D., additional, Dinoko, T., additional, Maqabuka, B., additional, Makhathini, L., additional, Mdletshe, L., additional, Shirinda, O., additional, and Sowazi, K., additional

Published
2022
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29. Probing Mo93m Isomer Depletion with an Isomer Beam

Author

Guo, S., primary, Ding, B., additional, Zhou, X. H., additional, Wu, Y. B., additional, Wang, J. G., additional, Xu, S. W., additional, Fang, Y. D., additional, Petrache, C. M., additional, Lawrie, E. A., additional, Qiang, Y. H., additional, Yang, Y. Y., additional, Ong, H. J., additional, Ma, J. B., additional, Chen, J. L., additional, Fang, F., additional, Yu, Y. H., additional, Lv, B. F., additional, Zeng, F. F., additional, Zeng, Q. B., additional, Huang, H., additional, Jia, Z. H., additional, Jia, C. X., additional, Liang, W., additional, Li, Y., additional, Huang, N. W., additional, Liu, L. J., additional, Zheng, Y., additional, Zhang, W. Q., additional, Rohilla, A., additional, Bai, Z., additional, Jin, S. L., additional, Wang, K., additional, Duan, F. F., additional, Yang, G., additional, Li, J. H., additional, Xu, J. H., additional, Li, G. S., additional, Liu, M. L., additional, Liu, Z., additional, Gan, Z. G., additional, Wang, M., additional, and Zhang, Y. H., additional

Published
2022
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30. Collective structures in Cu62

Author

Luo, D. W., primary, Xu, C., additional, Wang, Y. K., additional, Li, Z. H., additional, Bark, R. A., additional, Zhang, S. Q., additional, Hua, H., additional, Wang, S. Y., additional, Peng, J., additional, Li, X. Q., additional, Wu, H. Y., additional, Wang, X., additional, Wu, C. G., additional, Li, Q. T., additional, Lin, J., additional, Jin, Y., additional, Xu, W. Z., additional, Mu, L., additional, Meng, J., additional, Xu, F. R., additional, Ye, Y. L., additional, Jiang, D. X., additional, Jones, P., additional, Lawrie, E. A., additional, Papka, P., additional, Nkalanga, M. F., additional, Bucher, T. D., additional, Chisapi, M. V., additional, Msebi, L., additional, Jongile, S., additional, Ntshangase, S., additional, Zikhali, B. R., additional, Mthembu, S. H., additional, Seakamela, T., additional, Sithole, M. A., additional, Shirihda, O., additional, Aava, A. A., additional, Mdletshe, L., additional, Malatji, K. L., additional, Mhlongo, S., additional, and Makhathini, L., additional

Published
2022
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31. Reorientation-effect measurement of the 〈21+∥Ê2∥21+〉 matrix element in Ar36

Author

Orce, J. N., primary, Montes, E. J. Martín, additional, Abrahams, K. J., additional, Ngwetsheni, C., additional, Brown, B. A., additional, Raju, M. Kumar, additional, Mehl, C. V., additional, Mokgolobotho, M. J., additional, Akakpo, E. H., additional, Mavela, D. L., additional, Adsley, P., additional, Bark, R. A., additional, Bernier, N., additional, Bucher, T. D., additional, Erasmus, N. R., additional, Dinoko, T. S., additional, Jones, P. M., additional, Kheswa, N. Y., additional, Khumalo, N. A., additional, Lawrie, E. A., additional, Lawrie, J. J., additional, Lesch, B. L., additional, Majola, S. N. T., additional, Ntshangase, S. S., additional, Papka, P., additional, Pesudo, V., additional, Rebeiro, B., additional, Shirinda, O., additional, Wiedeking, M., additional, and Yahia-Cherif, W., additional

Published
2021
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32. Signature splitting of the g7/2[404]7/2+ bands in Ba131 and Ce133

Author

Ding, B., primary, Petrache, C. M., additional, Guo, S., additional, Lawrie, E. A., additional, Wakudyanaye, I., additional, Zhang, Z. H., additional, Wang, H. L., additional, Meng, H. Y., additional, Mengoni, D., additional, Qiang, Y. H., additional, Wang, J. G., additional, Andreoiu, C., additional, Astier, A., additional, Avaa, A., additional, Bäck, T., additional, Bark, R. A., additional, Bazzacco, D., additional, Boso, A., additional, Bucher, T. D., additional, Cederwall, B., additional, Chisapi, M. V., additional, Fan, H. L., additional, Galtarossa, F., additional, Garcia, F. H., additional, Goasduff, A., additional, Jaworski, G., additional, Jones, P., additional, Kuti, I., additional, Lawrie, J. J., additional, Li, G. S., additional, Li, R., additional, Liu, M. L., additional, Liu, Z., additional, Lomberg, B., additional, Lv, B. F., additional, Marchlewski, T., additional, Mdletshe, L., additional, Msebi, L., additional, Mthembu, S. H., additional, Napoli, D. R., additional, Netshiya, A., additional, Nkalanga, M. F., additional, Orce, J. N., additional, Ortner, K., additional, Recchia, F., additional, Riccetto, S., additional, Rohilla, A., additional, Seakamela, T. W., additional, Siciliano, M., additional, Sithole, M. A., additional, Sohler, D., additional, Srebrny, J., additional, Testov, D., additional, Tucholski, A., additional, Valiente-Dobón, J. J., additional, Wentzel, F., additional, Whitmore, K., additional, Zhang, Y. H., additional, Zheng, K. K., additional, Zhou, X. H., additional, and Zikhali, B. R., additional

Published
2021
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34. Rotational bands and chirality in 194Tl

Author

Masiteng, P. L., Lawrie, E. A., Ramashidzha, T. M., Lawrie, J. J., Bark, R. A., Lindsay, R., Komati, F., Kau, J., Maine, P., Maliage, S. M., Matamba, I., Mullins, S. M., Murray, S. H. T., Mutshena, K. P., Pasternak, A. A., Roux, D. G., Sharpey-Schafer, J. F., Shirinda, O., and Vymers, P. A.

Published
2014
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35. Structure of collective states built on the 11/2+ isomer in Os187 : Quasiparticle-plus-triaxial-rotor model and interpretation as tilted-precession bands

Author

Sithole, M. A., primary, Lawrie, E. A., additional, Mdletshe, L., additional, Majola, S. N. T., additional, Kardan, A., additional, Bucher, T. D., additional, Sharpey-Schafer, J. F., additional, Lawrie, J. J., additional, Ntshangase, S. S., additional, Avaa, A. A., additional, Bark, R. A., additional, Chisapi, M. V., additional, Jones, P., additional, Jongile, S., additional, Kenfack, D., additional, Khumalo, T. C., additional, Makhathini, L., additional, Malatji, K. L., additional, Maqabuka, B., additional, Mthembu, S. H., additional, Msebi, L., additional, Netshiya, A. A., additional, O'Neill, G., additional, Shirinda, O., additional, Someketa, P. M., additional, and Zikhali, B. R., additional

Published
2021
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36. ANIMATE: A PHASE II STUDY OF NIVOLUMAB IN TRANSPLANT ELIGIBLE PATIENTS WITH RELAPSED/REFRACTORY CLASSIC HODGKIN LYMPHOMA

Author

Booth, S., primary, Kirkwood, A., additional, Johnson, P., additional, Barrington, S., additional, Gallop‐Evans, E., additional, Peggs, K., additional, Warbey, V., additional, Burton, C., additional, Ardavan, A., additional, Phillips, B., additional, Lawrie, E., additional, Pike, L., additional, Northend, M., additional, Clifton‐Hadley, L., additional, Jenner, R., additional, and Collins, G. P., additional

Published
2021
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37. Tilted precession bands in ¹³⁵Nd

Author

Lv, B. F. (B. F.), Petrache, C. M. (C. M.), Lawrie, E. A. (E. A.), Astier, A. (A.), Dupont, E. (E.), Zheng, K. K. (K. K.), Greenlees, P. (P.), Badran, H. (H.), Calverley, T. (T.), Cox, D. M. (D. M.), Grahn, T. (T.), Hilton, J. (J.), Julin, R. (R.), Juutinen, S. (S.), Konki, J. (J.), Pakarinen, J. (J.), Papadakis, P. (P.), Partanen, J. (J.), Rahkila, P. (P.), Ruotsalainen, P. (P.), Sandzelius, M. (M.), Saren, J. (J.), Scholey, C. (C.), Sorri, J. (J.), Stolze, S. (S.), Uusitalo, J. (J.), Cederwall, B. (B.), Ertoprak, A. (A.), Liu, H. (H.), Guo, S. (S.), Wang, J. G. (J. G.), Ong, H. J. (H. J.), Zhou, X. H. (X. H.), Sun, Z. Y. (Z. Y.), Kuti, I. (I.), Timár, J. (J.), Tucholski, A. (A.), Srebrny, J. (J.), and Andreoiu, C. (C.)

Abstract

Two new excited bands built on the πh11/2 configuration have been identified in ¹³⁵Nd in addition to the known πh11/2 band. The energy spectra of the excited bands and the available electromagnetic transition probabilities are in good agreement with theoretical results obtained using quasiparticle-plus-triaxial-rotor model calculations. The properties of the bands identify them as tilted precession bands instead of wobbling bands. Our results give a new insight into the interpretation of the low-lying bands in odd-A mass nuclei, and can stimulate future studies to address the nuclear triaxiality.

Published
2021

39. In-beam spectroscopy of 72Ge

Author

Roux, D. G., Henninger, K. R., Bark, R. A., Bvumbi, S., Gueorguieva-Lawrie, E. A., Lawrie, J. J., Mullins, S. M., Murray, S. H. T., Ntshangase, S. S., Masiteng, L. P., and Shirinda, O.

Published
2012
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42. Candidate chiral bands in 198Tl

Author

Lawrie, E. A., Vymers, P. A., Vieu, Ch., Lawrie, J. J., Schück, C., Bark, R. A., Lindsay, R., Mabala, G. K., Maliage, S. M., Masiteng, P. L., Mullins, S. M., Murray, S. H. T., Ragnarsson, I., Ramashidzha, T. M., Sharpey-Schafer, J. F., and Shirinda, O.

Published
2010
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43. Tilted precession bands in Nd135

Author

Lv, B. F., primary, Petrache, C. M., additional, Lawrie, E. A., additional, Astier, A., additional, Dupont, E., additional, Zheng, K. K., additional, Greenlees, P., additional, Badran, H., additional, Calverley, T., additional, Cox, D. M., additional, Grahn, T., additional, Hilton, J., additional, Julin, R., additional, Juutinen, S., additional, Konki, J., additional, Pakarinen, J., additional, Papadakis, P., additional, Partanen, J., additional, Rahkila, P., additional, Ruotsalainen, P., additional, Sandzelius, M., additional, Saren, J., additional, Scholey, C., additional, Sorri, J., additional, Stolze, S., additional, Uusitalo, J., additional, Cederwall, B., additional, Ertoprak, A., additional, Liu, H., additional, Guo, S., additional, Wang, J. G., additional, Ong, H. J., additional, Zhou, X. H., additional, Sun, Z. Y., additional, Kuti, I., additional, Timár, J., additional, Tucholski, A., additional, Srebrny, J., additional, and Andreoiu, C., additional

Published
2021
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44. Low- and medium-spin negative-parity bands in the Os187 nucleus

Author

Sithole, M. A., primary, Sharpey Schafer, J. F., additional, Lawrie, E. A., additional, Majola, S. N. T., additional, Kardan, A., additional, Bucher, T. D., additional, Lawrie, J. J., additional, Mdletshe, L., additional, Ntshangase, S. S., additional, Netshiya, A. A., additional, Jones, P., additional, Makhathini, L., additional, Malatji, K. L., additional, Masiteng, P. L., additional, Ragnarsson, I., additional, Maqabuka, B., additional, Ndayishimye, J., additional, Shirinda, O., additional, Zikhali, B. R., additional, Jongile, S., additional, O'Neill, G., additional, Msebi, L., additional, Someketa, P. M., additional, Kenfack, D., additional, Mthembu, S. H., additional, Khumalo, T. C., additional, and Chisapi, M. V., additional

Published
2021
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45. First candidates for γ vibrational bands built on the [505]11/2⁻ neutron orbital in odd-A Dy isotopes

Author

Majola, S. N. T., Sithole, M. A., Mdletshe, L., Hartley, D., Timár, J., Nyakó, B. M., Allmond, J. M., Bark, R. A., Beausang, C., Bianco, L., Bucher, T. D., Bvumbi, S. P., Carpenter, M. P., Chiara, C. J., Cooper, N., Cullen, D. M., Curien, D., Dinoko, T. S., Gall, B. J. P., Garrett, P. E., Greenlees, P. T., Hirvonen, J., Jakobsson, U., Jones, P. M., Julin, R., Juutinen, S., Ketelhut, S., Kheswa, B. V., Kondev, F. G., Korichi, A., Kulp, W. D., Lauritsen, T., Lawrie, E. A., Makhathini, L., Masiteng, P. L., Maqabuka, B., McCutchan, E. A., Miller, D., Miller, S., Minkova, A., Msebi, L., Mthembu, S. H., Ndayishimye, J., Nieminen, P., Ngcobo, P. Z., Ntshangase, S. S., Orce, J. N., Peura, P., Rahkila, P., Redon, N., Riedinger, L. L., Riley, M. A., Roux, D. G., Ruotsalainen, P., Piot, J., Saren, J., Sharpey-Schafer, J. F., Scholey, C., Shirinda, O., Simpson, J., Sorri, J., Stefanescu, I., Stolze, S., Uusitalo, J., Wang, X., Werner, V., Wood, J. L., Yu, C.-H., Zhu, S., and Zimba, G.

Subjects
nuclear spin and parity, shell model, collective levels, hiukkasfysiikka, ydinfysiikka, nuclear structure and decays, nuclear fusion, nuclear reactions
Abstract

Rotational structures have been measured using the Jurogam II and GAMMASPHERE arrays at low spin following the 155Gd(α,2n)157Dy and 148Nd(12C,5n)155Dy reactions at 25 and 65 MeV, respectively. We report high-K bands, which are conjectured to be the first candidates of a Kπ=2+γ vibrational band, built on the [505]11/2− neutron orbital, in both odd-A155,157Dy isotopes. The coupling of the first excited K=0+ states or the so-called β vibrational bands at 661 and 676 keV in 154Dy and 156Dy to the [505]11/2− orbital, to produce a Kπ=11/2− band, was not observed in both 155Dy and 157Dy, respectively. The implication of these findings on the interpretation of the first excited 0+ states in the core nuclei 154Dy and 156Dy are also discussed. peerReviewed

Published
2020

46. First application of the Oslo method in inverse kinematics - Nuclear level densities and gamma-ray strength functions of 87Kr

Author

Ingeberg, V. W., Siem, S., Wiedeking, M., Sieja, K., Zeiser, F., Bleuel, D. L., Brits, C. P., Bucher, D. T., Dinoko, T. S., Easton, J. L., Görgen, A., Jones, P., Kheswa, B. V., Khumalo, N. A., Larsen, A. C., Lawrie, E. A., Lawrie, J. J., Majola, S. N. T., Malatji, K. L., Makhathini, L., Maqabuka, B., Negi, D., Noncolela, S. P., Papka, P., Sahin, E., Schwengner, R., Tveten, G. M., and Zikhali, B. R.

Subjects
(d, level density, Hauser-Feshbach model, shell model, inverse kinematics, Nuclear structure, gamma-ray strength function, Nuclear Experiment, nuclear reactions, p) recation, s-process
Abstract

A novel technique for extracting the gamma-ray strength function (SF) and nuclear level density (NLD) from inverse kinematics experiments is presented, which allows for measurements of these properties, across a vast range of previously inaccessible nuclei. Proton-gamma coincidence events from the d(86Kr, p)87Kr reaction were measured at iThemba LABS and the SF and NLD in 87 Kr obtained with the Oslo Method.The SF and NLD are important parameters in Hauser-Feshbach calculations to constrain (n,gamma) cross sections of nuclei for which these cannot be measured directly. The extracted SF and NLD are used as input in Hauser-Feshbach calculations to constrain the 86Kr(n,gamma)87Kr cross section which is important for the 87Rb production in the s-process. The nature of the low-energy region of the SF is explored through comparison to shell model calculations with the LNPS-SDG interaction.

Published
2020

47. First candidates for γ vibrational bands built on the [505]11/2⁻ neutron orbital in odd-A Dy isotopes

Author

Majola, S. N. (S. N. T.), Sithole, M. A. (M. A.), Mdletshe, L. (L.), Hartley, D. (D.), Timar, J. (J.), Nyako, B. M. (B. M.), Allmond, J. M. (J. M.), Bark, R. A. (R. A.), Beausang, C. (C.), Bianco, L. (L.), Bucher, T. D. (T. D.), Bvumbi, S. P. (S. P.), Carpenter, M. P. (M. P.), Chiara, C. J. (C. J.), Cooper, N. (N.), Cullen, D. M. (D. M.), Curien, D. (D.), Dinoko, T. S. (T. S.), Gall, B. J. (B. J. P.), Garrett, P. E. (P. E.), Greenlees, P. T. (P. T.), Hirvonen, J. (J.), Jakobsson, U. (U.), Jones, P. M. (P. M.), Julin, R. (R.), Juutinen, S. (S.), Ketelhut, S. (S.), Kheswa, B. V. (B., V), Kondev, F. G. (F. G.), Korichi, A. (A.), Kulp, W. D. (W. D.), Lauritsen, T. (T.), Lawrie, E. A. (E. A.), Makhathini, L. (L.), Masiteng, P. L. (P. L.), Maqabuka, B. (B.), McCutchan, E. A. (E. A.), Miller, D. (D.), Miller, S. (S.), Minkova, A. (A.), Msebi, L. (L.), Mthembu, S. H. (S. H.), Ndayishimye, J. (J.), Nieminen, P. (P.), Ngcobo, P. Z. (P. Z.), Ntshangase, S. S. (S. S.), Orce, J. N. (J. N.), Peura, P. (P.), Rahkila, P. (P.), Redon, N. (N.), Riedinger, L. L. (L. L.), Riley, M. A. (M. A.), Roux, D. G. (D. G.), Ruotsalainen, P. (P.), Piot, J. (J.), Saren, J. (J.), Sharpey-Schafer, J. F. (J. F.), Scholey, C. (C.), Shirinda, O. (O.), Simpson, J. (J.), Sorri, J. (J.), Stefanescu, I. (I), Stolze, S. (S.), Uusitalo, J. (J.), Wang, X. (X.), Werner, V. (V), Wood, J. L. (J. L.), Yu, C.-H. (C-H), Zhu, S. (S.), Zimba, G. (G.), Majola, S. N. (S. N. T.), Sithole, M. A. (M. A.), Mdletshe, L. (L.), Hartley, D. (D.), Timar, J. (J.), Nyako, B. M. (B. M.), Allmond, J. M. (J. M.), Bark, R. A. (R. A.), Beausang, C. (C.), Bianco, L. (L.), Bucher, T. D. (T. D.), Bvumbi, S. P. (S. P.), Carpenter, M. P. (M. P.), Chiara, C. J. (C. J.), Cooper, N. (N.), Cullen, D. M. (D. M.), Curien, D. (D.), Dinoko, T. S. (T. S.), Gall, B. J. (B. J. P.), Garrett, P. E. (P. E.), Greenlees, P. T. (P. T.), Hirvonen, J. (J.), Jakobsson, U. (U.), Jones, P. M. (P. M.), Julin, R. (R.), Juutinen, S. (S.), Ketelhut, S. (S.), Kheswa, B. V. (B., V), Kondev, F. G. (F. G.), Korichi, A. (A.), Kulp, W. D. (W. D.), Lauritsen, T. (T.), Lawrie, E. A. (E. A.), Makhathini, L. (L.), Masiteng, P. L. (P. L.), Maqabuka, B. (B.), McCutchan, E. A. (E. A.), Miller, D. (D.), Miller, S. (S.), Minkova, A. (A.), Msebi, L. (L.), Mthembu, S. H. (S. H.), Ndayishimye, J. (J.), Nieminen, P. (P.), Ngcobo, P. Z. (P. Z.), Ntshangase, S. S. (S. S.), Orce, J. N. (J. N.), Peura, P. (P.), Rahkila, P. (P.), Redon, N. (N.), Riedinger, L. L. (L. L.), Riley, M. A. (M. A.), Roux, D. G. (D. G.), Ruotsalainen, P. (P.), Piot, J. (J.), Saren, J. (J.), Sharpey-Schafer, J. F. (J. F.), Scholey, C. (C.), Shirinda, O. (O.), Simpson, J. (J.), Sorri, J. (J.), Stefanescu, I. (I), Stolze, S. (S.), Uusitalo, J. (J.), Wang, X. (X.), Werner, V. (V), Wood, J. L. (J. L.), Yu, C.-H. (C-H), Zhu, S. (S.), and Zimba, G. (G.)

Abstract

Rotational structures have been measured using the Jurogam II and GAMMASPHERE arrays at low spin following the ¹⁵⁵Gd(α,2n)¹⁵⁷Dy and ¹⁴⁸Nd(¹²C,5n)¹⁵⁵Dy reactions at 25 and 65 MeV, respectively. We report high-K bands, which are conjectured to be the first candidates of a Kπ=2⁺γ vibrational band, built on the [505]11/2⁻ neutron orbital, in both odd-A155,157Dy isotopes. The coupling of the first excited K=0⁺ states or the so-called β vibrational bands at 661 and 676 keV in ¹⁵⁴Dy and ¹⁵⁶Dy to the [505]11/2− orbital, to produce a Kπ=11/2⁻ band, was not observed in both ¹⁵⁵Dy and ¹⁵⁷Dy, respectively. The implication of these findings on the interpretation of the first excited 0⁺ states in the core nuclei ¹⁵⁴Dy and ¹⁵⁶Dy are also discussed.

Published
2020

48. Evidence for pseudospin-chiral quartet bands in the presence of octupole correlations

Author

Guo, S., Petrache, C. M., Mengoni, D., Qiang, Y. H., Wang, Y. P., Wang, Y. Y., Meng, J., Wang, Y. K., Zhang, S. Q., Zhao, P. W., Astier, A., Wang, J. G., Fan, H. L., Dupont, E., Lv, B. F., Bazzacco, D., Boso, A., Goasduff, A., Recchia, F., Testov, D., Galtarossa, F., Jaworski, G., Napoli, D. R., Riccetto, S., Siciliano, M., Valiente-Dobon, J. J., Liu, M. L., Li, G. S., Zhou, X. H., Zhang, Y. H., Andreoiu, C., Garcia, F. H., Ortner, K., Whitmore, K., Atac Nyberg, Ayse, Bäck, Torbjörn, Cederwall, Bo, Lawrie, E. A., Kuti, I, Sohler, D., Marchlewski, T., Srebrny, J., Tucholski, A., Guo, S., Petrache, C. M., Mengoni, D., Qiang, Y. H., Wang, Y. P., Wang, Y. Y., Meng, J., Wang, Y. K., Zhang, S. Q., Zhao, P. W., Astier, A., Wang, J. G., Fan, H. L., Dupont, E., Lv, B. F., Bazzacco, D., Boso, A., Goasduff, A., Recchia, F., Testov, D., Galtarossa, F., Jaworski, G., Napoli, D. R., Riccetto, S., Siciliano, M., Valiente-Dobon, J. J., Liu, M. L., Li, G. S., Zhou, X. H., Zhang, Y. H., Andreoiu, C., Garcia, F. H., Ortner, K., Whitmore, K., Atac Nyberg, Ayse, Bäck, Torbjörn, Cederwall, Bo, Lawrie, E. A., Kuti, I, Sohler, D., Marchlewski, T., Srebrny, J., and Tucholski, A.

Abstract

Three nearly degenerate pairs of doublet bands are identified in Ba-131. Two of them, with positive-parity, are interpreted as pseudospin-chiral quartet bands. This is the first time that a complete set of chiral doublet bands built on the pseudospin partners pi(d(5/2), g(7/2)) is observed. The chiral bands with opposite parity built on 3-quasiparticle configurations are directly connected by many E1 transitions, without involving an intermediary non-chiral configuration. The observed band structures in Ba-131 have been investigated by using the reflection-asymmetric particle rotor model. The energies and the electromagnetic transition ratios of the three pairs of doublet bands observed in Ba-131 are reproduced and they are interpreted as chiral doublet bands with three-quasiparticle configurations. It is the first time that multiple chiral bands are observed in the presence of enhanced octupole correlations and pseudospin symmetry., QC 20201020

Published
2020
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49. Pseudospin partner bands in Ba130

Author

Guo, S., primary, Petrache, C. M., additional, Mengoni, D., additional, Liu, Y. X., additional, Chen, Q. B., additional, Qiang, Y. H., additional, Astier, A., additional, Dupont, E., additional, Zheng, K. K., additional, Wang, J. G., additional, Ding, B., additional, Lv, B. F., additional, Liu, M. L., additional, Fang, Y. D., additional, Zhou, X. H., additional, Bazzacco, D., additional, Boso, A., additional, Goasduff, A., additional, Recchia, F., additional, Testov, D., additional, Galtarossa, F., additional, Jaworski, G., additional, Napoli, D. R., additional, Riccetto, S., additional, Siciliano, M., additional, Valiente-Dobon, J. J., additional, Andreoiu, C., additional, Garcia, F. H., additional, Ortner, K., additional, Whitmore, K., additional, Cederwall, B., additional, Lawrie, E. A., additional, Kuti, I., additional, Sohler, D., additional, Marchlewski, T., additional, Srebrny, J., additional, and Tucholski, A., additional

Published
2020
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50. Measurement and analysis of nuclear γ -ray production cross sections in proton interactions with Mg, Si, and Fe nuclei abundant in astrophysical sites over the incident energy range E=30–66 MeV

Author

Yahia-Cherif, W., primary, Ouichaoui, S., additional, Kiener, J., additional, Lawrie, E. A., additional, Lawrie, J. J., additional, Tatischeff, V., additional, Belhout, A., additional, Moussa, D., additional, Papka, P., additional, Benhabiles-Mezhoud, H., additional, Bucher, T. D., additional, Chafa, A., additional, Conradie, J. L., additional, Damache, S., additional, Debabi, M., additional, Deloncle, I., additional, Easton, J. L., additional, Hamadache, C., additional, Hammache, F., additional, Jones, P., additional, Kheswa, B. V., additional, Khumalo, N. A., additional, Lamula, T., additional, Majola, S. N. T., additional, Ndayishimye, J., additional, Negi, D., additional, Noncolela, S. P., additional, de Séréville, N., additional, Sharpey-Schafer, J. F., additional, Shirinda, O., additional, Wiedeking, M., additional, and Wyngaardt, S., additional

Published
2020
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