64 results on '"Balabanski DL"'
Search Results
2. Doubly-magic character of Sn-132 studied via electromagnetic moments of Sn-133
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Rodriguez, L, Balabanski, DL, Bissell, ML, Blaum, K, Cheal, B, De Gregorio, G, Ekman, J, Ruiz, RF Garcia, Gargano, A, Georgiev, G, Gins, W, Gorges, C, Heylen, H, Kanellakopoulos, A, Kaufmann, S, Lagaki, V, Lechner, S, Maass, B, Malbrunot-Ettenauer, S, Neugart, R, Neyens, G, Noertershaeuser, W, Sailer, S, Sanchez, R, Schmidt, S, Wehner, L, Wraith, C, Xie, L, Xu, ZY, Yang, XF, Yordanov, DT, Rodriguez, Lv, Balabanski, Dl, Bissell, Ml, Blaum, K, Cheal, B, De Gregorio, G, Ekman, J, Ruiz, Rfg, Gargano, A, Georgiev, G, Gins, W, Gorges, C, Heylen, H, Kanellakopoulos, A, Kaufmann, S, Lagaki, V, Lechner, S, Maass, B, Malbrunot-Ettenauer, S, Neugart, R, Neyens, G, Nortershauser, W, Sailer, S, Sanchez, R, Schmidt, S, Wehner, L, Wraith, C, Xie, L, Xu, Zy, Yang, Xf, and Yordanov, Dt
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CHARGE RADII ,NUMBER ,Science & Technology ,Physics, Nuclear ,BARIUM ISOTOPES ,Physics ,Physical Sciences ,HYPERFINE-STRUCTURE ,ISOTOPE SHIFT ,R-PROCESS - Abstract
ispartof: PHYSICAL REVIEW C vol:102 issue:5 status: published
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- 2020
3. Electromagnetic character of the competitive gamma gamma/gamma-decay from Ba-137m
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Soderstrom, P-A, Capponi, L, Aciksoz, E, Otsuka, T, Tsoneva, N, Tsunoda, Y, Balabanski, DL, Pietralla, N, Guardo, GL, Lattuada, D, Lenske, H, Matei, C, Nichita, D, Pappalardo, A, and Petruse, T
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Multidisciplinary Sciences ,MODEL ,Science & Technology ,Nuclear Theory ,2-PHOTON DECAY ,SIMULATION ,Science & Technology - Other Topics ,STATE - Abstract
Second-order processes in physics is a research topic focusing attention from several fields worldwide including, for example, non-linear quantum electrodynamics with high-power lasers, neutrinoless double-β decay, and stimulated atomic two-photon transitions. For the electromagnetic nuclear interaction, the observation of the competitive double-γ decay from 137mBa has opened up the nuclear structure field for detailed investigation of second-order processes through the manifestation of off-diagonal nuclear polarisability. Here, we confirm this observation with an 8.7σ significance, and an improved value on the double-photon versus single-photon branching ratio as 2.62 × 10-6(30). Our results, however, contradict the conclusions from the original experiment, where the decay was interpreted to be dominated by a quadrupole-quadrupole component. Here, we find a substantial enhancement in the energy distribution consistent with a dominating octupole-dipole character and a rather small quadrupole-quadrupole component in the decay, hindered due to an evolution of the internal nuclear structure. The implied strongly hindered double-photon branching in 137mBa opens up the possibility of the double-photon branching as a feasible tool for nuclear-structure studies on off-diagonal polarisability in nuclei where this hindrance is not present. ispartof: NATURE COMMUNICATIONS vol:11 issue:1 ispartof: location:England status: published
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- 2020
4. g Factor of the Zr-99 (7/2(+)) Isomer: Monopole Evolution in the Shape-Coexisting Region
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Boulay, F, Simpson, GS, Ichikawa, Y, Kisyov, S, Bucurescu, D, Takamine, A, Ahn, DS, Asahi, K, Baba, H, Balabanski, DL, Egami, T, Fujita, T, Fukuda, N, Funayama, C, Furukawa, T, Georgiev, G, Gladkov, A, Hass, M, K., Imamura, Inabe, N, Ishibashi, Y, Kawaguchi, T, Kawamura, T, Kim, W, Kobayashi, Y, Kojima, S, Kusoglu, A, Lozeva, R, Momiyama, S, Mukul, I, Niikura, M, Nishibata, H, Nishizaka, T, Odahara, A, Ohtomo, Y, Ralet, D, Sato, T, Shimizu, Y, Sumikama, T, Suzuki, H, Takeda, H, Tao, LC, Togano, Y, Tominaga, D, Ueno, H, Yamazaki, H, Yang, XF, Daugas, JM, and Parnefjord Gustafsson, Fredrik
- Abstract
The gyromagnetic factor of the low-lying E=251.96(9) keV isomeric state of the nucleus ^{99}Zr was measured using the time-dependent perturbed angular distribution technique. This level is assigned a spin and parity of J^{π}=7/2^{+}, with a half-life of T_{1/2}=336(5) ns. The isomer was produced and spin aligned via the abrasion-fission of a ^{238}U primary beam at RIKEN RIBF. A magnetic moment |μ|=2.31(14)μ_{N} was deduced showing that this isomer is not single particle in nature. A comparison of the experimental values with interacting boson-fermion model IBFM-1 results shows that this state is strongly mixed with a main νd_{5/2} composition. Furthermore, it was found that monopole single-particle evolution changes significantly with the appearance of collective modes, likely due to type-II shell evolution. ispartof: Physical Review Letters vol:124 issue:11 ispartof: location:United States status: Published online
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- 2020
5. Preliminary results for the F-19(p,alpha)O-16 reaction cross section measured at INFN-LNS
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Petruse, T, Guardo, Gl, La Cognata, M, Lattuada, D, Spitalieri, C, Balabanski, Dl, Aciksoz, E, Acosta, L, Capponi, L, Carbone, D, Cherubini, S, Choudhury, D, D'Agata, G, Di Pietro, A, Figuera, P, Gulino, M, Kilik, I, La Commara, M, Lamia, L, Matei, C, Palmerini, S, Pizzone, Rg, Romano, S, Soderstrom, Pa, Sparta, R, Tumino, A, and Onses, Sv
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- 2020
6. Laser Spectroscopy of Tin and Cadmium: Across N=82 and Closing in on N=50
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Yordanov, DT, Balabanski, DL, Bissell, ML, Blaum, K, Budinčević, I, Frömmgen, N, Garcia Ruiz, RF, Georgiev, G, Geppert, Ch, Hammen, M, Kowalska, M, Neugart, R, Neyens, G, Nörtershäuser, W, Papuga, J, and Sánchez, R
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Detectors and Experimental Techniques - Published
- 2013
7. Nuclear moment studies in the odd-mass In isotopes up to N=82 using the Tilted Foils technique
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Georgiev, G, Yordanov, DT, Balabanski, DL, Fedosseev, V, Hass, M, Hirayama, Y, Imai, N, Kowalska, M, Kusoglu, A, Ljungvall, J, Marsh, B, Nilsson, T, Rothe, S, Sotty, C, Stuchbery, AE, Tornqvist, H, and Wenander, F
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Detectors and Experimental Techniques - Published
- 2012
8. Nuclear moments of micro-second isomeric fragments at BigRIPS
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Chevrier, R, Daugas, JM, Gaudefroy, L, Hass, M, Hass, H, Ueno, H, Aoi, N, Fukuda, N, Ichikawa, Y, Inabe, N, Ishihara, M, Kameda, D, Kubo, T, Ohnishi, T, Takeda, H, Watanabe, H, Yoshimi, A, Asahi, K, Furukawa, T, Hayashi, H, Iijima, H, Inoue, T, Ishii, Y, Nanao, T, Suzuki, K, Tsuchiya, M, Balabanski, DL, Georgiev, G, Cottenier, S, Neyens, G, Rajabali, MM, Otsu, Hideaki, Motobayashi, Tohru, Roussel-Chomaz, Patricia, and Otsuka, Takaharu
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Electromagnetic moments ,Nuclear structure ,Projectile fragmentation - Abstract
The measurement of nuclear moments of a μ-second isomeric state have been successfully performed using the RIKEN Radioactive Ion Beam Facility. The Time Dependent Perturbed Angular Distribution technique was applied on the 43S isomeric state produced by the fragmentation of a 48Ca beam and selected with the BigRIPS spectrometer. Following the measurement of the known g-factor of the isomer the quadrupole moment of this state was measured. Its spectroscopic quadrupole moment |QS| = 23(3) efm2 agreed with both shell model and beyond mean field calculations. ispartof: pages:33-40 ispartof: Proceedings of the French–Japanese Symposium pages:33-40 ispartof: LIA 2011 symposium location:RIKEN, Wako, Japan date:5 Jan - 8 Jan 2011 status: published
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- 2012
9. Is the 7/2(1)- isomer state of 43S spherical?
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Chevrier, R, Daugas, JM, Gaudefroy, L, Ichikawa, Y, Ueno, H, Hass, M, Haas, H, Cottenier, Stefaan, Aoi, N, Asahi, K, Balabanski, DL, Fukuda, N, Furukawa, T, Georgiev, G, Hayashi, H, Iijima, H, Inabe, N, Inoue, T, Ishihara, M, Ishii, Y, Kameda, D, Kubo, T, Nanao, T, Neyens, G, Ohnishi, T, Rajabali, MM, Suzuki, K, Takeda, H, Tsuchiya, M, Vermeulen, N, Watanabe, H, and Yoshimi, A
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ISLAND ,NEUTRON-RICH NUCLEI ,N=28 SHELL CLOSURE ,Physics and Astronomy ,BORDER ,STABILITY ,INVERSION ,Nuclear Physics - Experiment ,FRAGMENTATION ,PYRITE ,QUADRUPOLE-MOMENT ,FE-57 - Abstract
We report on the spectroscopic quadrupole moment measurement of the 7/2(1)(-) isomeric state in S-43(16)27 [E* = 320.5(5) keV, T-1/2 = 415(3) ns], using the time dependent perturbed angular distribution technique at the RIKEN RIBF facility. Our value, vertical bar Q(s) vertical bar = 23(3) efm(2), is larger than that expected for a single-particle state. Shell model calculations using the modern SDPF-U interaction for this mass region reproduce remarkably well the measured vertical bar Q(s) vertical bar, and show that non-negligible correlations drive the isomeric state away from a purely spherical shape.
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- 2011
10. g-factor measurements at RISING: The cases of Sn-127 and Sn-128
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Atanasova, L, Balabanski, DL, Chamoli, SK, Hass, M, Simpson, GS, Bazzacco, D, Becker, F, Bednarczyk, P, Benzoni, G, Blasi, N, Blazhev, A, Bracco, A, Brandau, C, Caceres, L, Camera, F, Crespi, FCL, Detistov, P, Doornenbal, P, Fahlander, C, Farnea, E, Georgiev, G, Gerl, J, Gladnishki, KA, Gorska, M, Grebosz, J, Hoischen, R, Ilie, G, Ionescu-Bujor, M, Iordachescu, A, Jungclaus, A, Lo Bianco, G, Kmiecik, M, Kojouharov, I, Kurz, N, Lakshmi, S, Lozeva, R, Maj, A, Montanari, D, Neyens, G, Pfuetzner, M, Pietri, S, Podolyak, Z, Prokopowicz, W, Rudolph, D, Rusev, G, Saito, TR, Saltarelli, A, Schaffner, H, Schwengner, R, Tashenov, S, Valiente-Dobon, JJ, Vermeulen, N, Walker, J, Werner-Malento, E, Wieland, O, Wollersheim, HJ, Grawe, H, and Hjorth-Jensen, M
- Abstract
We report on g-factor measurements of the 19/2+ T1/2=4.5(3) μs isomer in 127Sn and the 10+ T1/2=2.69(23) μs isomer in 128Sn. These isomers were produced and spin-aligned in relativistic heavy-ion fragmentation at GSI and were selected and separated by the GSI fragment separator (FRS). The γ-rays of the isomeric decay were detected by the RISING γ-ray spectrometer. The method of time-differential perturbed angular distributions was utilized. The measured g-factors, g(19/2+; 127Sn)=− 0.17(2) and g(10+; 128Sn)=− 0.20(4), are compared with shell model calculations. The measured g-factors confirm the predominantly νh11/2− 2 and ν(s1/2− 1h11/2−2) character of the 10+ and 19/2− isomers in 128Sn and 127Sn, respectively. The results demonstrate the feasibility of the method for similar measurements in exotic neutron-rich nuclei.
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- 2010
11. Post-accelerated polarized beams at the REX-LINAC
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Georgiev, G, Hass, M, Balabanski, DL, Fiori, E, Gottberg, A, Herlert, A, Hemmingsen, L, Johnston, K, Lindroos, M, Ljungvall, J, Nilsson, T, Pakarinen, J, Riisager, K, Sotty, C, Stachura, M, Tornqvist, H, Van de Walle, J, Voulot, D, Wenander, F, and Zeitz, WD
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Detectors and Experimental Techniques - Published
- 2010
12. b-delayed spectroscopy of laser-polarized beams
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Yordanov, DT, Balabanski, DL, Bissell, ML, Blaum, K, Georgiev, G, Geppert, C, Kowalska, M, Kreim, K, Neugart, R, Neyens, G, and Nörtershäuser, W
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Detectors and Experimental Techniques - Published
- 2010
13. Laser spectroscopy of cadmium isotopes: probing the nuclear structure between the neutron 50 and 82 shell closures
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Yordanov, DT, Blaum, K, Balabanski, DL, Bissell, ML, Georgiev, G, Geppert, C, Kowalska, M, Krämer, J, Kreim, K, Krieger, A, Neyens, G, Nörtershäuser, W, Sánchez, R, Stroke, HH, and Neugart, R
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Detectors and Experimental Techniques - Published
- 2009
14. Weakly deformed oblate structures in Os-198(76)122
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Podolyak, Z, Steer, SJ, Pietri, S, Xu, FR, Liu, HL, Regan, PH, Rudolph, D, Garnsworthy, AB, Hoischen, R, Gorska, M, Gerl, J, Wollersheim, HJ, Kurtukian-Nieto, T, Benzoni, G, Shizuma, T, Becker, F, Bednarczyk, P, Caceres, L, Doornenbal, P, Geissel, H, Grebosz, J, Kelic, A, Kojouharov, I, Kurz, N, Montes, F, Prokopowicz, W, Saito, T, Schaffner, H, Tashenov, S, Heinz, A, Pfutzner, M, Jungclaus, A, Balabanski, DL, Brandau, C, Bruce, AM, Catford, WN, Cullen, IJ, Dombradi, Z, Estevez, E, Gelletly, W, Ilie, G, Jolie, J, Jones, GA, Kmiecik, M, Kondev, FG, Kruecken, R, Lalkovski, S, Liu, Z, Maj, A, Myalski, S, Schwertel, S, Walker, PM, Werner-Malento, E, and Wieland, O
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- 2009
15. Single-particle behavior at N=126: Isomeric decays in neutron-rich Pt-204
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Steer, SJ, Podolyak, Z, Pietri, S, Gorska, M, Regan, PH, Rudolph, D, Werner-Malento, E, Garnsworthy, AB, Hoischen, R, Gerl, J, Wollersheim, HJ, Maier, KH, Grawe, H, Becker, F, Bednarczyk, P, Caceres, L, Doornenbal, P, Geissel, H, Greabosz, J, Kelic, A, Kojouharov, I, Kurz, N, Montes, F, Prokopowicz, W, Saito, T, Schaffner, H, Tashenov, S, Heinz, A, Pfuetzner, M, Kurtukian-Nieto, T, Benzoni, G, Jungclaus, A, Balabanski, DL, Brandau, C, Brown, BA, Bruce, AM, Catford, WN, Cullen, IJ, Dombradi, Z, Estevez, ME, Gelletly, W, Ilie, G, Jolie, J, Jones, GA, Kmiecik, M, Kondev, FG, Kruecken, R, Lalkovski, S, Liu, Z, Maj, A, Myalski, S, Schwertel, S, Shizuma, T, Walker, PM, and Wieland, O
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- 2008
16. g-factor measurements at REX-ISOLDE
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LoBianco, G, Balabanski, DL, and Georgiev, G
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Detectors and Experimental Techniques - Published
- 2008
17. Precision measurement of Li-11 moments: Influence of halo neutrons on the Li-9 core
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Neugart, R, Balabanski, DL, Blaum, K, Borremans, D, Himpe, P, Kowalska, M, Lievens, Peter, Mallion, S, Neyens, Gerda, Vermeulen, N, and Yordanov, DT
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halo nuclei ,nuclear moments ,be-11 ,magnetic-moment ,shell-model ,rich nuclei ,moments ,spin - Abstract
The electric quadrupole moment and the magnetic moment of the Li-11 halo nucleus have been measured with more than an order of magnitude higher precision than before, vertical bar Q vertical bar = 33.3(5) mb and mu = +3.6712(3)mu(N), revealing a 8.8(1.5)% increase of the quadrupole moment relative to that of Li-9. This result is compared to various models that aim at describing the halo properties. In the shell model an increased quadrupole moment points to a significant occupation of the 1d orbits, whereas in a simple halo picture this can be explained by relating the quadrupole moments of the proton distribution to the charge radii. Advanced models so far fail to reproduce simultaneously the trends observed in the radii and quadrupole moments of the lithium isotopes. 4 pages, 4 figures, 1 table ispartof: Physical Review Letters vol:101 issue:13 ispartof: location:United States status: published
- Published
- 2008
18. New sub-mu s isomers in Sn-125,Sn-127,Sn-129 and isomer systematics of Sn124-130
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Lozeva Lozeva, Radomira, Grawe, H, Neyens, Gerda, Atanasova, LA, Balabanski, DL, Bazzacco, D, Becker, F, Bednarczyk, P, Benzoni, G, Blasi, N, Blazhev, A, Bracco, A, Brandau, C, Caceres, L, Camera, F, Chamoli, SK, Crespi, FCL, Daugas, J-M, Detistov, P, De Rydt, Marieke, Doornenbal, P, Fahlander, C, Farnea, E, Georgiev, G, Gerl, J, Gladnishki, KA, Gorska, M, Grebosz, J, Hass, M, Hoischen, R, Ilie, G, Ionescu-Bujor, M, Iordachescu, A, Jungclaus, A, Kmiecik, M, Kojouharov, I, Kurz, N, Lakshmi, SP, Lo Bianco, G, Mallion, Stephen, Maj, A, Montanari, D, Perru, O, Pfuetzner, M, Pietri, S, Pinston, JA, Podolyak, Zs, Prokopowicz, W, Rudolph, D, Rusev, G, Saitoh, TR, Saltarelli, A, Schaffner, H, Schwengner, R, Tashenov, S, Turzo, K, Valiente-Dobon, JJ, Vermeulen, Nele, Walker, J, Werner-Malento, E, Wieland, O, and Wollersheim, H-J
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transition-probabilities ,isomer lifetimes ,heavy-ion collisions ,125-129Sn isomers ,relativistic U-fission ,yrast isomers ,g-RISING ,gsi ,nuclei ,gamma-ray ,energy-levels ,beta-decay ,isotopes ,detectors - Abstract
New sub-mu s isomers have been observed in the neutron-rich Sn isotopes. Sn-125,Sn-127,Sn-129 nuclei have been produced in a relativistic fission reaction of U-238 on a Be-9 target at 750 A.MeV and by the fragmentation of Xe-136 at 600 A.MeV populating high-spin yrast states. In addition to the already known mu s isomers, three new ones with sub-mu s half-lives have been observed. These yrast isomers are the high-spin members of the nu(d(3/2)(-1)h(11/2)(-2)) and nu h(11/2)(-n), seniority v = 3 multiplets leading to isomeric (23/2(+)) and (27/2(-)) states, respectively. Added to the already known 19/2(+)mu s isomers in this region the current work completes the systematic information of neutron-hole excitations toward the filling of the last h(11/2) orbital at N = 82. The results are discussed in the framework of state-of-the-art shell-model calculations using realistic interactions. ispartof: Physical Review C, Nuclear Physics vol:77 issue:6 pages:1-15 status: published
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- 2008
19. New sub-mu s isomers in Sn-125,Sn-127,Sn-129 and isomer systematics of Sn124-130
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Lozeva, RL, Simpson, GS, Grawe, H, Neyens, G, Atanasova, LA, Balabanski, DL, Bazzacco, D, Becker, F, Bednarczyk, P, Benzoni, G, Blasi, N, Blazhev, A, Bracco, A, Brandau, C, Caceres, L, Camera, F, Chamoli, SK, Crespi, FCL, Daugas, J-M, Detistov, P, De Rydt, M, Doornenbal, P, Fahlander, C, Farnea, E, Georgiev, G, Gerl, J, Gladnishki, KA, Gorska, M, Grebosz, J, Hass, M, Hoischen, R, Ilie, G, Ionescu-Bujor, M, Iordachescu, A, Jolie, J, Jungclaus, A, Kmiecik, M, Kojouharov, I, Kurz, N, Lakshmi, SP, Lo Bianco, G, Mallion, S, Maj, A, Montanari, D, Perru, O, Pfuetzner, M, Pietri, S, Pinston, JA, Podolyak, Zsolt, Prokopowicz, W, Rudolph, D, Rusev, G, Saitoh, TR, Saltarelli, A, Schaffner, H, Schwengner, R, Tashenov, S, Turzo, K, Valiente-Dobon, JJ, Vermeulen, N, Walker, J, Werner-Malento, E, Wieland, O, and Wollersheim, H-J
- Published
- 2008
20. Yrast and non-yrast 2(+) states of Ce-134 and Nd-136 populated in relativistic Coulomb excitation
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Saito, TR, Saito, N, Starosta, K, Beller, J, Pietralla, N, Wollersheim, HJ, Balabanski, DL, Banu, A, Bark, RA, Beck, T, Becker, F, Bednarczyk, P, Behr, K-H, Benzoni, G, Bizzeti, PG, Boiano, C, Bracco, A, Brambilla, S, Bruenle, A, Buerger, A, Caceres, L, Camera, F, Crespi, FCL, Doornenbal, P, Garnsworthy, AB, Geissel, H, Gerl, J, Gorska, M, Grebosz, J, Hagemann, G, Jolie, J, Kavatsyuk, M, Kavatsyuk, O, Koike, T, Kojouharov, I, Kurz, N, Leske, J, Lo Bianco, G, Maj, A, Mallion, S, Mandal, S, Maliage, M, Otsuka, Taka, Petrache, CM, Podolyak, Zs, Prokopowicz, W, Rainovski, G, Reiter, P, Richard, A, Schaffner, H, Schielke, S, Sletten, G, Thompson, NJ, Tonev, D, Walker, J, Warr, N, Wieland, O, and Zhong, Q
- Abstract
The first 2+ states in 134Ce and 136Nd and the second 2+ state in 136Nd were populated by Coulomb excitation at relativistic energies, and γ-rays were measured using the RISING setup at GSI. For 134Ce an indication of the excitation to the second 2+ state was observed. This experiment performed for the first time Coulomb excitation to second 2+ states with rare isotope beams at relativistic energies. For 136Nd the View the MathML sourceB(E2;21+→0+), View the MathML sourceB(E2;22+→0+), and View the MathML sourceB(E2;22+→21+) values relative to the previously known View the MathML sourceB(E2;21+→0+) value for 134Ce are determined as 81(10), 11(3) and 180(92) W.u., respectively. The results are discussed in the framework of geometrical models that indicate pronounced γ-softness in these nuclei. ispartof: Physics Letters B vol:669 issue:1 pages:19-23 status: published
- Published
- 2008
21. g factor of the exotic N=21 isotope Al-34: probing the N=20 and N=28 shell gaps at the border of the 'island of inversion'
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Himpe, P, Neyens, Gerda, Balabanski, DL, Belier, G, Daugas, JM, de Oliveira Santos, F, De Rydt, Marieke, Flanagan, KT, Matea, I, Morel, P, Penionzhkevich, Yu E, Perrot, L, Smirnova, NA, Stodel, C, Thomas, JC, Vermeulen, Nele, Yordanov, DT, Utsuno, Y, and Otsuka, T
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MODEL ,fragmentation reaction ,magnetic moment ,Physics and Astronomy ,GROUND-STATE ,MG-32 ,CLOSURE ,SPECTROMETER ,island of inversion ,NUCLEAR MOMENTS ,34Al g-factor - Abstract
For the first time the g factor of an isotope beyond N = 20 near the 'island of inversion' has been measured. A Al-34 radioactive beam was produced in a one-neutron pickup reaction on a S-36 primary beam at 77.5 MeV/u, providing a large spin-polarization for application of the P-Nuclear Magnetic Resonance (beta-NMR) method. The measured g factor of Al-34 vertical bar g vertical bar = 0.539(2), combined with results from earlier beta-decay studies, allows to firmly assign a ground state spin/parity 4(-). Comparison to large scale shell model calculations reveals that a dominant amount of intruder components is needed in the Al-34 wave function to account for the observed large magnetic moment mu = (+)2.156(16)mu(N). This reveals Z = 13 to be a true 'transition number' between the normal Z = 14 Si isotopes and the abnormal Z = 12 Mg isotopes. The sensitivity of this odd-odd ground state dipole moment to the N = 20, as well as the N = 28 gap, reveals that both are significantly reduced, despite Z = 13 being outside the conventional island of inversion. (c) 2007 Elsevier B.V. All rights reserved. ispartof: Physics Letters B vol:658 issue:5 pages:203-208 status: published
- Published
- 2008
22. Isospin symmetry and proton decay: Identification of the 10+ isomer in 54Ni
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Rudolph, D, Hoischen, R, Hellstrom, M, Pietri, S, Podolyak, Zsolt, Regan, PH, Garnsworthy, AB, Steer, SJ, Becker, F, Bednarczyk, P, Caceres, L, Doornenbal, P, Gerl, J, Gorska, M, Grebosz, J, Kojouharov, I, Kurz, N, Prokopowicz, W, Schaffner, H, Wollersheim, HJ, Andersson, L-L, Atanasova, L, Balabanski, DL, Bentley, MA, Blazhev, A, Brandau, C, Brown, JR, Fahlander, C, Johansson, EK, Jungclaus, A, and Lenzi, SM
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Nuclear Theory ,Nuclear Experiment - Abstract
The gamma decays from an isomeric 10(+) state at 6457 keV in the nucleus Ni-54(28)26 have been identified using the GSI fragment separator in conjunction with the RISING Ge-detector array. The state is interpreted as the isobaric analog of the 6527-keV 10(+) isomer in Fe-54(26)28.The results are discussed in terms of isospin-dependent shell-model calculations. Clear evidence is presented for a discrete l = 5 proton decay branch into the first excited 9/2(-) state of the daughter Co-53. This decay is the first of its kind observed following projectile fragmentation reactions.
- Published
- 2008
23. First isomeric quadrupole moment measured in fragmentation reactions: The case of Fe-61(m)(9/2(+))
- Author
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Vermeulen, Nele, Chamoli, SK, Daugas, JM, Hass, M, Balabanski, DL, Delaroche, JP, de Oliveira-Santos, F, Georgiev, G, Girod, M, Goldring, G, Goutte, H, Grevy, S, Matea, I, Morel, P, Singh, BS Nara, Penionzkevich, Yu-E, Perrot, L, Perru, O, Peru, S, Roig, O, Sarazin, F, Simpson, GS, Sobolev, Yu, Stefan, I, Stodel, C, Yordanov, DT, and Neyens, Gerda
- Subjects
polarization ,Nuclear Theory ,deformation ,projectile fragmentation ,fusion-evaporation reactions ,exotic nuclei ,isomer g-factor ,neutron ,61Fe 9/2+ isomer ,TDPAD ,heavy-ion ,Nuclear Experiment ,nuclides ,yrast decay schemes ,fe-57 ,isotopes - Abstract
This paper demonstrates the feasibility of quadrupole moment measurements on isomeric levels populated in projectile fragmentation reactions. The neutron-rich Fe-61(9/2(+)) [E-*= 861 keV, T-1/2= 239(5) ns] isomer was produced and spin aligned by the intermediate energy fragmentation of a Ni-64 beam and implanted in a Cd single crystal. Its spectroscopic quadrupole moment Q(s)=41(6) e fm(2) agrees with mean-field based calculations using the finite-range Gogny force, suggesting a moderately deformed shape characterized by an intrinsic charge quadrupole moment Q(0)=-85 e fm(2) or Q(0)=+115 e fm(2). The present measurement paves the way for future determinations of isomeric quadrupole moments in more exotic nuclei. ispartof: Physical Review C, Nuclear physics vol:75 issue:5 pages:1-4 status: published
- Published
- 2007
24. A RISING g-factor measurement of the 19/2(+) isomer in Sn-127
- Author
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Atanasova, L, Balabanski, DL, Hass, M, Becker, Frank, Bednarczyk, P, Chamoli, SK, Doornenbal, P, Georgiev, G, Gerl, J, Gladnishki, KA, Gorska, M, Grebosz, J, Kmiecik, M, Lakshmi, S, Lozeva Lozeva, Radomira, Maj, A, Neyens, Gerda, Pfutzner, M, Simpson, G, Vermeulen, Nele, and Wollersheim, HJ
- Subjects
=+149%22">90 <= a >= 149 ,electromagnetic moments ,projectile fragmentaion ,g-factor ,19/2+ isomer ,angular distribution and correlation measurements ,projectile and target fragmentation ,127Sn isomer - Abstract
The g-factor of the 19/2+T-1/2 = 4.5(3) mu s isomer in Sn-127, which was populated in relativistic projectile fragmentation, was measured within the g-RISING campaign at GSI, utilizing the time-differential perturbed angular distribution method. The deduced g-factor vertical bar g vertical bar approximate to 0.16 is in agreement with theoretical estimates based on the empirical g-factors. (c) 2007 Elsevier B.V. All rights reserved. ispartof: Progress in Particle and Nuclear Physics vol:59 issue:1 pages:355-357 status: published
- Published
- 2007
25. Spin-alignment and g-factor measurement of the I-pi=12(+) isomer in Pb-192 produced in the relativistic-energy fragmentation of a U-238 beam
- Author
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Kmiecik, M, Maj, A, Gerl, J, Neyens, G, Atanasova, L, Balabanski, DL, Becker, F, Bednarczyk, P, Benzoni, G, Blasi, N, Bracco, A, Brambilla, S, Caceres, L, Camera, F, Ciemala, M, Crespi, FCL, Chamoli, SK, Chmel, S, Daugas, JM, Detistov, P, Doornenbal, P, Georgiev, G, Gladnishki, K, Gorska, M, Grawe, H, Grebosz, J, Hass, M, Hoischen, R, Ilie, G, Ionescu-Bujor, M, Jolie, J, Kojuharov, I, Krasznahorkay, A, Kulessa, R, Lach, M, Lakshmi, S, Leoni, S, Lo Bianco, G, Lozeva, R, Maier, KH, Mallion, S, Mazurek, K, Meczynski, W, Million, B, Montanari, D, Myalski, S, Petrache, C, Pfuetzner, M, Pietri, S, Podolyak, Z, Prokopowicz, W, Rudolph, D, Saito, N, Saito, TR, Saltarelli, A, Simpson, GS, Styczen, J, Vermeulen, N, Werner-Malento, E, Wieland, O, Wollersheim, HJ, Zieblinski, M, Kmiecik, M, Maj, A, Gerl, J, Neyens, G, Atanasova, L, Balabanski, DL, Becker, F, Bednarczyk, P, Benzoni, G, Blasi, N, Bracco, A, Brambilla, S, Caceres, L, Camera, F, Ciemala, M, Crespi, FCL, Chamoli, SK, Chmel, S, Daugas, JM, Detistov, P, Doornenbal, P, Georgiev, G, Gladnishki, K, Gorska, M, Grawe, H, Grebosz, J, Hass, M, Hoischen, R, Ilie, G, Ionescu-Bujor, M, Jolie, J, Kojuharov, I, Krasznahorkay, A, Kulessa, R, Lach, M, Lakshmi, S, Leoni, S, Lo Bianco, G, Lozeva, R, Maier, KH, Mallion, S, Mazurek, K, Meczynski, W, Million, B, Montanari, D, Myalski, S, Petrache, C, Pfuetzner, M, Pietri, S, Podolyak, Z, Prokopowicz, W, Rudolph, D, Saito, N, Saito, TR, Saltarelli, A, Simpson, GS, Styczen, J, Vermeulen, N, Werner-Malento, E, Wieland, O, Wollersheim, HJ, and Zieblinski, M
- Published
- 2010
26. g-Factors of Isomers Around N ³ 40, Z ³ 28 from Time-Dependent Larmor Precession on Spin-Aligned Projectile-Like Fragments
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Neyens G, Georgiev G, Grzywacz R, Hass M, Santos FD, Lewitowicz M, Balabanski DL, Bingham C, Borcea C, Coulier N, Coussement R, Daugas JM, Defrance G, Goldring G, Gorska M, Grawe H, O'Leary C, Macovei I, Mach H, Page R, Pfutzner M, Penionzkevich YE, Podol and Neyens G, Georgiev G, Grzywacz R, Hass M, Santos FD, Lewitowicz M, Balabanski DL, Bingham C, Borcea C, Coulier N, Coussement R, Daugas JM, Defrance G, Goldring G, Gorska M, Grawe H, O'Leary C, Macovei I, Mach H, Page R, Pfutzner M, Penionzkevich YE, Podol
- Published
- 2002
27. Quadrupole moments of high-spin isomers: Test of the tilted-axis cranking model
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Balabanski, Dl, Vyvey, K., Neyens, G., Almehed, D., Blaha, P., Borremans, D., Chmel, S., Coulier, N., Coussement, R., Clercq, W., Frauendorf, S., Georgi Georgiev, Hubel, H., Lepine-Szily, A., Mineva, M., Nenoff, N., Pancholi, S., Rossbach, D., Schwengner, R., Teughels, S., and Walker, Pm
- Subjects
FOS: Physical sciences ,Nuclear Experiment (nucl-ex) ,Nuclear Experiment - Abstract
We report the results of recent measurements of the spectroscopic quadrupole moments of high-spin isomers. For the K=35/2- five-quasiparticle isomer in 179W we measured Q_s=4.00(+0.83)(-1.06)eb. It corresponds to a smaller deformation compared to the ground states of the W isotopes and is in disagreement with the current theoretical predictions. We also measured the quadrupole moment of the I=11- isomer in 196Pb, Q_s=(-)3.41(66)eb. It has the same proton s(-2)1/2 h9/2 i13/2 configuration as the one suggested for the I=16- magnetic bandhead which allows to deduce the quadrupole moment of the 16- state as Q_s=-0.316(97)eb. This small value proves the near sphericity of the bandhead., Comment: Contributed paper at "High Spin Physics 2001", see http://www.fuw.edu.pl/~hs2001/, to be published in Acta Physica Polonica B
28. Possible triaxial superdeformation in Hf-174
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Hartley, Dj, Djongolov, M., Riedinger, Ll, Kondev, Fg, Janssens, Rvf, Abu Saleem, K., Ahmad, I., Balabanski, Dl, Carpenter, Mp, Chowdury, P., Cullen, Dm, Danchev, M., Dracoulis, Gd, El-Masri, H., Goon, J., Heinz, A., Kaye, Ra, Khoo, Tl, Lauritsen, T., Lister, Cj, Moore, Ef, Riley, Ma, Seweryniak, D., Shestakova, I., Sletten, G., Walker, Pm, Carl Wheldon, Wiedenhover, I., Zeidan, O., and Zhang, Jy
29. The quadrupole moment of N-18, measured with the Level Mixing Resonance (LMR) method
- Author
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Coulier, N., Neyens, G., Teughels, S., Georgi Georgiev, Ternier, S., Vyvey, K., Coussement, R., Balabanski, Dl, Cortina-Gil, D., Lewitowicz, M., Mittig, W., Santos, Fd, Roussel-Chomaz, P., Rogers, W., and Lepine-Szily, A.
30. Excited states and terminating bands in I-123,I-124
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Balabanski, Dl, Georgi Rainovski, Blasi, N., Lo Bianco, G., Falconi, G., Signorelli, S., Bazzacco, D., Angelis, G., Napoli, Dr, Cardona, Aa, Krainer, Aj, and Somacal, H.
31. Structure of high-spin states in Sr-90 and Sr-92
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Stefanova, Ea, Schwengner, R., Danchev, M., Rainovski, G., Balabanski, Dl, Axiotis, M., Angelis, G., Djongolov, M., Donau, F., Gadea, A., Galindo, E., Hartley, Dj, Jungclaus, A., Kroll, T., Kutsarova, T., Lieb, Kp, Marginean, N., Martinez, T., Mueller, Wf, Napoli, Dr, Reviol, W., Riedinger, Ll, Schilling, Kd, Eberth, J., Thelen, O., Ur, Ca, Andreas Wagner, and Zeidan, O.
32. Tilted three-quasiparticle band in Xe-123
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Georgi Rainovski, Lo Bianco, G., Balabanski, Dl, Roussev, G., Falconi, G., Blasi, N., Bazzacco, D., Angelis, G., Napoli, Dr, Cardona, Ma, Kreiner, Aj, Somacal, H., Dimitrov, Vi, Zhang, Jy, and Donau, F.
33. Gyromagnetic factors of isomers in the neutron-rich N=40 region: The case of Cu-69
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Georgi Georgiev, Neyens, G., Balabanski, Dl, Bingham, C., Borcea, C., Coulier, N., Coussement, R., Daugas, Jm, Defrance, G., Goldring, G., Gorska, M., Grawe, H., Grzywacz, R., Hass, M., Lewitowicz, M., Mach, H., Matea, I., Santos, Fd, Page, Rd, Pfutzner, M., Penionzkevich, Ye, Podolyak, Z., Regan, Ph, Rykaczewski, K., Sawicka, M., Smirnova, Na, Sobolev, Y., Stanoiu, M., Teughels, S., and Vyvey, K.
34. Structural trends in atomic nuclei from laser spectroscopy of tin
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Stefan E. Schmidt, Zhengyu Xu, Gerda Neyens, A. Kanellakopoulos, Witold Nazarewicz, S. Kaufmann, Mark Bissell, Sacha Schiffmann, L. Wehner, B. Maaß, W. Gins, Per Jönsson, Bradley Cheal, S. Malbrunot-Ettenauer, Jörgen Ekman, Zoltán Harman, Rodolfo Sánchez, Christoph H. Keitel, Natalia S. Oreshkina, L. V. Rodríguez, Paul-Gerhard Reinhard, Klaus Blaum, Jacek Bieron, Michel Godefroid, L. Xie, Christian Gorges, Rainer Neugart, Asimina Papoulia, Pekka Pyykkö, Wilfried Nörtershäuser, Gediminas Gaigalas, Xiaofei Yang, Ronald Fernando Garcia Ruiz, Dimiter L. Balabanski, Stefan Sailer, S. Lechner, V. Lagaki, Georgi Georgiev, H. Heylen, Deyan T. Yordanov, C. Wraith, Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), Balabanski, DL, Bieroń, J, Bissell, ML, Blaum, K, Cheal, B, Ekman, J, Gaigalas, G, Garcia Ruiz, RF, Georgiev, G, Gins, W, Godefroid, MR, Gorges, C, Harman, Z, Heylen, H, Jönsson, P, Kanellakopoulos, Anastasios, Kaufmann, S, Keitel, CH, Lagaki, V, Lechner, S, Maaß, B, Malbrunot-Ettenauer, S, Nazarewicz, W, Neugart, R, Neyens, G, Nörtershäuser, W, Oreshkina, NS, Papoulia, A, Pyykkö, P, Reinhard, P-G, Sailer, S, Sánchez, R, Schiffmann, S, Schmidt, S, Wehner, L, Wraith, C, Xie, L, Xu, ZY, Yang, XF, Department of Chemistry, and Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)
- Subjects
CHARGE RADII ,Materials science ,Proton ,Atom and Molecular Physics and Optics ,Research group Z. Harman – Division C. H. Keitel ,116 Chemical sciences ,Nuclear Theory ,Electron shell ,General Physics and Astronomy ,chemistry.chemical_element ,lcsh:Astrophysics ,Atomic structure calculations ,nuclear structure calculations ,the neutral atom of Sn ,[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex] ,01 natural sciences ,114 Physical sciences ,Effective nuclear charge ,0103 physical sciences ,Isotopes of tin ,lcsh:QB460-466 ,ISOTOPE SHIFT ,ELEMENTS ,ddc:530 ,Physics::Atomic Physics ,010306 general physics ,Spectroscopy ,Nuclear Experiment ,Hyperfine structure ,010308 nuclear & particles physics ,lcsh:QC1-999 ,3. Good health ,QUADRUPOLE-MOMENTS ,chemistry ,GAS ,Atomic nucleus ,Physics::Accelerator Physics ,Atom- och molekylfysik och optik ,Atomic physics ,Präzisionsexperimente - Abteilung Blaum ,Tin ,lcsh:Physics - Abstract
Communications Physics 3(1), 107 (2020). doi:10.1038/s42005-020-0348-9, Published by Springer Nature, London
- Published
- 2020
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35. Direct Observation of Competing M1 and M3 Transitions in ^{10}B.
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Kuşoğlu A, Balabanski DL, Hu RZ, Fan SQ, Xu FR, Constantin P, Söderström PA, Cuciuc M, Aogaki S, Ban RS, Borcea R, Coman A, Corbu R, Costache C, Covali A, Dinescu I, Florea NM, Iancu V, Ionescu A, Mărginean NM, Mihai C, Mihai RE, Nedelcu CV, Petruse T, Pai H, Pappalardo A, Sirbu OA, Sotty CO, Stan L, State AN, Testov DA, Tozar T, Turturica A, Turturica G, Ujeniuc S, Ur CA, Vasilca V, and Zhu F
- Abstract
Excited states in ^{10}B were populated with the ^{10}B(p,p^{'}γ)^{10}B^{*} reaction at 8.5 MeV and their γ decay was investigated via coincidence γ-ray spectroscopy. The emitted γ rays were measured using large-volume LaBr_{3}:Ce and CeBr_{3} detectors placed in anti-Compton shields. This allowed the observation of weak γ-ray transitions, such as the M3 transition between the J^{π},T=0^{+},1 isobaric analog state (IAS) and the J^{π},T=3^{+},0 ground state and the E2 transition between the J^{π},T=2_{1}^{+},0 state and the IAS, i.e., performing measurements of branching ratios at the level of λ≥10^{-4}. For the first time in ^{10}B, the competing M1 and M3 transitions from the decay of the IAS have been observed in a γ spectroscopy experiment. The experimental results are compared with ab initio no-core shell model calculation using the newest version of the local position-space chiral N^{3}LO nucleon-nucleon interaction. The calculations reproduce correctly the ordering of the bound states in ^{10}B, and are in reasonable agreement with the observed branching ratios and reduced transition probabilities.
- Published
- 2024
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36. Design and construction of a 9 MeV γ-ray source based on capture of moderated plutonium-beryllium neutrons in nickel.
- Author
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Söderström PA, Balabanski DL, Ban RS, Ciocan G, Cuciuc M, Dhal A, Fugaru V, Iancu V, Rotaru A, Şerban AB, State A, Testov D, Turturică GV, and Vasilca V
- Abstract
We have designed and constructed a high-energy γ-ray source for detector characterisation and calibration. The source is a composite type based on a plutonium-beryllium neutron emitter embedded in a paraffin moderator, which is homogeneously mixed with nickel powder. The 9 MeV γ-ray source produces approximately 450 photons per second in 4π when 2.2×10
5 neutrons per second are emitted, corresponding to a surface flux of 9 MeV γ-rays of approximately 2.5×10-6 cm-2 per emitted neutron. Here we discuss the properties and design of this source, including the characterisation of homogeneity and high-energy γ-ray emission spectra., Competing Interests: Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2022 Elsevier Ltd. All rights reserved.)- Published
- 2023
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37. Boulay et al. Reply.
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Boulay F, Simpson GS, Ichikawa Y, Kisyov S, Bucurescu D, Takamine A, Ahn DS, Asahi K, Baba H, Balabanski DL, Egami T, Fujita T, Fukuda N, Funayama C, Furukawa T, Georgiev G, Gladkov A, Hass M, Imamura K, Inabe N, Ishibashi Y, Kawaguchi T, Kawamura T, Kim W, Kobayashi Y, Kojima S, Kusoglu A, Lozeva R, Momiyama S, Mukul I, Niikura M, Nishibata H, Nishizaka T, Odahara A, Ohtomo Y, Ralet D, Sato T, Shimizu Y, Sumikama T, Suzuki H, Takeda H, Tao LC, Togano Y, Tominaga D, Ueno H, Yamazaki H, Yang XF, and Daugas JM
- Published
- 2021
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38. Nuclear resonance fluorescence drug inspection.
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Lan H, Song T, Huang X, Zhao S, Zhou J, Zhu Z, Xu Y, Balabanski DL, and Luo W
- Subjects
- Spectrum Analysis, Narcotics analysis
- Abstract
There is an increasing challenge to prevent illicit drug smuggling across borders and seaports. However, the existing techniques in-and-of-themselves are not sufficient to identify the illicit drugs rapidly and accurately. In the present study, combining nuclear resonance fluorescence (NRF) spectroscopy and the element (or isotope) ratio approach, we present a novel inspection method that can simultaneously reveal the elemental (or isotopic) composition of the illicit drugs, such as widely abused methamphetamine, cocaine, heroin, ketamine and morphine. In the NRF spectroscopy, the nuclei are excited by the induced photon beam, and measurement of the characteristic energies of the emitted [Formula: see text] rays from the distinct energy levels in the excited nuclei provides "fingerprints" of the interested elements in the illicit drugs. The element ratio approach is further used to identify drug elemental composition in principle. Monte Carlo simulations show that four NRF peaks from the nuclei [Formula: see text]C, [Formula: see text]N and [Formula: see text]O can be detected with high significance of 7-24[Formula: see text] using an induced photon beam flux of [Formula: see text]. The ratio of [Formula: see text]/[Formula: see text] and/or [Formula: see text]/[Formula: see text] for illicit drugs inspected are then extracted using the element ratio approach. It is found that the present results of simulations are in good agreement with the theoretical calculations. The feasibility to detect the illicit drugs, inside the 15-mm-thick iron shielding, or surrounded by thin benign materials, is also discussed. It is indicated that, using the state-of-the-art [Formula: see text]-ray source of high intensity and energy-tunability, the proposed method has a great potential for identifying drugs and explosives in a realistic measurement time.
- Published
- 2021
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39. Characterization of a plutonium-beryllium neutron source.
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Söderström PA, Matei C, Capponi L, Açıksöz E, Balabanski DL, and Mitu IO
- Abstract
Here we present an investigation of a plutonium-beryllium neutron source available at the Horia Hulubei National Institute of Physics and Nuclear Engineering, Romania, to be used for detector characterization during the implementation of the Extreme Light Infrastructure - Nuclear Physics project. Using several different techniques and instruments, we have measured the isotopic composition for plutonium to be 75%
239 Pu and 24%240 Pu, with a minor contribution from other isotopes. Furthermore, we have measured the source activity as of November 20th 2019 to be 2.220(5)×105 neutrons per second with a mean energy of 3.25(17) MeV. We have also measured both the γ-tagged and full neutron energy spectra, and discuss the origin of the observed structure in the neutron energies based on these. All these parameters are of importance both for traceability of nuclear material, radioprotection, and accurate detector characterization., (Copyright © 2020 Elsevier Ltd. All rights reserved.)- Published
- 2021
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40. Electromagnetic character of the competitive γγ/γ-decay from 137m Ba.
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Söderström PA, Capponi L, Açıksöz E, Otsuka T, Tsoneva N, Tsunoda Y, Balabanski DL, Pietralla N, Guardo GL, Lattuada D, Lenske H, Matei C, Nichita D, Pappalardo A, and Petruse T
- Abstract
Second-order processes in physics is a research topic focusing attention from several fields worldwide including, for example, non-linear quantum electrodynamics with high-power lasers, neutrinoless double-β decay, and stimulated atomic two-photon transitions. For the electromagnetic nuclear interaction, the observation of the competitive double-γ decay from
137m Ba has opened up the nuclear structure field for detailed investigation of second-order processes through the manifestation of off-diagonal nuclear polarisability. Here, we confirm this observation with an 8.7σ significance, and an improved value on the double-photon versus single-photon branching ratio as 2.62 × 10-6 (30). Our results, however, contradict the conclusions from the original experiment, where the decay was interpreted to be dominated by a quadrupole-quadrupole component. Here, we find a substantial enhancement in the energy distribution consistent with a dominating octupole-dipole character and a rather small quadrupole-quadrupole component in the decay, hindered due to an evolution of the internal nuclear structure. The implied strongly hindered double-photon branching in137m Ba opens up the possibility of the double-photon branching as a feasible tool for nuclear-structure studies on off-diagonal polarisability in nuclei where this hindrance is not present.- Published
- 2020
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41. g Factor of the ^{99}Zr (7/2^{+}) Isomer: Monopole Evolution in the Shape-Coexisting Region.
- Author
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Boulay F, Simpson GS, Ichikawa Y, Kisyov S, Bucurescu D, Takamine A, Ahn DS, Asahi K, Baba H, Balabanski DL, Egami T, Fujita T, Fukuda N, Funayama C, Furukawa T, Georgiev G, Gladkov A, Hass M, Imamura K, Inabe N, Ishibashi Y, Kawaguchi T, Kawamura T, Kim W, Kobayashi Y, Kojima S, Kusoglu A, Lozeva R, Momiyama S, Mukul I, Niikura M, Nishibata H, Nishizaka T, Odahara A, Ohtomo Y, Ralet D, Sato T, Shimizu Y, Sumikama T, Suzuki H, Takeda H, Tao LC, Togano Y, Tominaga D, Ueno H, Yamazaki H, Yang XF, and Daugas JM
- Abstract
The gyromagnetic factor of the low-lying E=251.96(9) keV isomeric state of the nucleus ^{99}Zr was measured using the time-dependent perturbed angular distribution technique. This level is assigned a spin and parity of J^{π}=7/2^{+}, with a half-life of T_{1/2}=336(5) ns. The isomer was produced and spin aligned via the abrasion-fission of a ^{238}U primary beam at RIKEN RIBF. A magnetic moment |μ|=2.31(14)μ_{N} was deduced showing that this isomer is not single particle in nature. A comparison of the experimental values with interacting boson-fermion model IBFM-1 results shows that this state is strongly mixed with a main νd_{5/2} composition. Furthermore, it was found that monopole single-particle evolution changes significantly with the appearance of collective modes, likely due to type-II shell evolution.
- Published
- 2020
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42. Laser Spectroscopy of Neutron-Rich Tin Isotopes: A Discontinuity in Charge Radii across the N=82 Shell Closure.
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Gorges C, Rodríguez LV, Balabanski DL, Bissell ML, Blaum K, Cheal B, Garcia Ruiz RF, Georgiev G, Gins W, Heylen H, Kanellakopoulos A, Kaufmann S, Kowalska M, Lagaki V, Lechner S, Maaß B, Malbrunot-Ettenauer S, Nazarewicz W, Neugart R, Neyens G, Nörtershäuser W, Reinhard PG, Sailer S, Sánchez R, Schmidt S, Wehner L, Wraith C, Xie L, Xu ZY, Yang XF, and Yordanov DT
- Abstract
The change in mean-square nuclear charge radii δ⟨r^{2}⟩ along the even-A tin isotopic chain ^{108-134}Sn has been investigated by means of collinear laser spectroscopy at ISOLDE/CERN using the atomic transitions 5p^{2} ^{1}S_{0}→5p6 s^{1}P_{1} and 5p^{2} ^{3}P_{0}→5p6s ^{3}P_{1}. With the determination of the charge radius of ^{134}Sn and corrected values for some of the neutron-rich isotopes, the evolution of the charge radii across the N=82 shell closure is established. A clear kink at the doubly magic ^{132}Sn is revealed, similar to what has been observed at N=82 in other isotopic chains with larger proton numbers, and at the N=126 shell closure in doubly magic ^{208}Pb. While most standard nuclear density functional calculations struggle with a consistent explanation of these discontinuities, we demonstrate that a recently developed Fayans energy density functional provides a coherent description of the kinks at both doubly magic nuclei, ^{132}Sn and ^{208}Pb, without sacrificing the overall performance. A multiple correlation analysis leads to the conclusion that both kinks are related to pairing and surface effects.
- Published
- 2019
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43. From Calcium to Cadmium: Testing the Pairing Functional through Charge Radii Measurements of ^{100-130}Cd.
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Hammen M, Nörtershäuser W, Balabanski DL, Bissell ML, Blaum K, Budinčević I, Cheal B, Flanagan KT, Frömmgen N, Georgiev G, Geppert C, Kowalska M, Kreim K, Krieger A, Nazarewicz W, Neugart R, Neyens G, Papuga J, Reinhard PG, Rajabali MM, Schmidt S, and Yordanov DT
- Abstract
Differences in mean-square nuclear charge radii of ^{100-130}Cd are extracted from high-resolution collinear laser spectroscopy of the 5s ^{2}S_{1/2}→5p ^{2}P_{3/2} transition of the ion and from the 5s5p ^{3}P_{2}→5s6s ^{3}S_{1} transition in atomic Cd. The radii show a smooth parabolic behavior on top of a linear trend and a regular odd-even staggering across the almost complete sdgh shell. They serve as a first test for a recently established new Fayans functional and show a remarkably good agreement in the trend as well as in the total nuclear charge radius.
- Published
- 2018
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44. The extreme light infrastructure-nuclear physics (ELI-NP) facility: new horizons in physics with 10 PW ultra-intense lasers and 20 MeV brilliant gamma beams.
- Author
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Gales S, Tanaka KA, Balabanski DL, Negoita F, Stutman D, Tesileanu O, Ur CA, Ursescu D, Andrei I, Ataman S, Cernaianu MO, D'Alessi L, Dancus I, Diaconescu B, Djourelov N, Filipescu D, Ghenuche P, Ghita DG, Matei C, Seto K, Zeng M, and Zamfir NV
- Abstract
The European Strategy Forum on Research Infrastructures (ESFRI) has selected in 2006 a proposal based on ultra-intense laser fields with intensities reaching up to 10
22 -1023 W cm-2 called 'ELI' for Extreme Light Infrastructure. The construction of a large-scale laser-centred, distributed pan-European research infrastructure, involving beyond the state-of-the-art ultra-short and ultra-intense laser technologies, received the approval for funding in 2011-2012. The three pillars of the ELI facility are being built in Czech Republic, Hungary and Romania. The Romanian pillar is ELI-Nuclear Physics (ELI-NP). The new facility is intended to serve a broad national, European and International science community. Its mission covers scientific research at the frontier of knowledge involving two domains. The first one is laser-driven experiments related to nuclear physics, strong-field quantum electrodynamics and associated vacuum effects. The second is based on a Compton backscattering high-brilliance and intense low-energy gamma beam (<20 MeV), a marriage of laser and accelerator technology which will allow us to investigate nuclear structure and reactions as well as nuclear astrophysics with unprecedented resolution and accuracy. In addition to fundamental themes, a large number of applications with significant societal impact are being developed. The ELI-NP research centre will be located in Măgurele near Bucharest, Romania. The project is implemented by 'Horia Hulubei' National Institute for Physics and Nuclear Engineering (IFIN-HH). The project started in January 2013 and the new facility will be fully operational by the end of 2019. After a short introduction to multi-PW lasers and multi-MeV brilliant gamma beam scientific and technical description of the future ELI-NP facility as well as the present status of its implementation of ELI-NP, will be presented. The science and examples of societal applications at reach with these electromagnetic probes with much improved performances provided at this new facility will be discussed with a special focus on day-one experiments and associated novel instrumentation.- Published
- 2018
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45. Simple Nuclear Structure in (111-129)Cd from Atomic Isomer Shifts.
- Author
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Yordanov DT, Balabanski DL, Bissell ML, Blaum K, Budinčević I, Cheal B, Flanagan K, Frömmgen N, Georgiev G, Geppert Ch, Hammen M, Kowalska M, Kreim K, Krieger A, Meng J, Neugart R, Neyens G, Nörtershäuser W, Rajabali MM, Papuga J, Schmidt S, and Zhao PW
- Abstract
Isomer shifts have been determined in ^{111-129}Cd by high-resolution laser spectroscopy at CERN-ISOLDE. The corresponding mean square charge-radii changes, from the 1/2^{+} and the 3/2^{+} ground states to the 11/2^{-} isomers, have been found to follow a distinct parabolic dependence as a function of the atomic mass number. Since the isomers have been previously associated with simplicity due to the linear mass dependence of their quadrupole moments, the regularity of the isomer shifts suggests a higher order of symmetry affecting the ground states in addition. A comprehensive description assuming nuclear deformation is found to accurately reproduce the radii differences in conjunction with the known quadrupole moments. This intuitive interpretation is supported by covariant density functional theory.
- Published
- 2016
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46. Publisher's Note: (37)(97)Rb(60): The Cornerstone of the Region of Deformation around A∼100 [Phys. Rev. Lett. 115, 172501 (2015)].
- Author
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Sotty C, Zielińska M, Georgiev G, Balabanski DL, Stuchbery AE, Blazhev A, Bree N, Chevrier R, Das Gupta S, Daugas JM, Davinson T, De Witte H, Diriken J, Gaffney LP, Geibel K, Hadyńska-Klek K, Kondev FG, Konki J, Kröll T, Morel P, Napiorkowski P, Pakarinen J, Reiter P, Scheck M, Seidlitz M, Siebeck B, Simpson G, Törnqvist H, Warr N, and Wenander F
- Published
- 2015
- Full Text
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47. (97)(37)Rb(60): The Cornerstone of the Region of Deformation around A ∼ 100 [corrected].
- Author
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Sotty C, Zielińska M, Georgiev G, Balabanski DL, Stuchbery AE, Blazhev A, Bree N, Chevrier R, Das Gupta S, Daugas JM, Davinson T, De Witte H, Diriken J, Gaffney LP, Geibel K, Hadyńska-Klȩk K, Kondev FG, Konki J, Kröll T, Morel P, Napiorkowski P, Pakarinen J, Reiter P, Scheck M, Seidlitz M, Siebeck B, Simpson G, Törnqvist H, Warr N, and Wenander F
- Abstract
Excited states of the neutron-rich nuclei (97,99)Rb were populated for the first time using the multistep Coulomb excitation of radioactive beams. Comparisons of the results with particle-rotor model calculations provide clear identification for the ground-state rotational band of (97)Rb as being built on the πg(9/2) [431] 3/2(+) Nilsson-model configuration. The ground-state excitation spectra of the Rb isotopes show a marked distinction between single-particle-like structures below N=60 and rotational bands above. The present study defines the limits of the deformed region around A∼100 and indicates that the deformation of (97)Rb is essentially the same as that observed well inside the deformed region. It further highlights the power of the Coulomb-excitation technique for obtaining spectroscopic information far from stability. The (99)Rb case demonstrates the challenges of studies with very short-lived postaccelerated radioactive beams.
- Published
- 2015
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48. Magnetism of an excited self-conjugate nucleus: precise measurement of the g factor of the 2(1)(+) state in (24)Mg.
- Author
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Kusoglu A, Stuchbery AE, Georgiev G, Brown BA, Goasduff A, Atanasova L, Balabanski DL, Bostan M, Danchev M, Detistov P, Gladnishki KA, Ljungvall J, Matea I, Radeck D, Sotty C, Stefan I, Verney D, and Yordanov DT
- Abstract
A precise measurement of the g factor of the first-excited state in the self-conjugate (N=Z) nucleus (24)Mg is performed by a new time-differential recoil-in-vacuum method based on the hyperfine field of hydrogenlike ions. Theory predicts that the g factors of such states, in which protons and neutrons occupy the same orbits, should depart from 0.5 by a few percent due to configuration mixing and meson-exchange effects. The experimental result, g=0.538±0.013, is in excellent agreement with recent shell-model calculations and shows a departure from 0.5 by almost 3 standard deviations, thus achieving, for the first time, the precision and accuracy needed to test theory. Proof of the new method opens the way for wide applications including measurements of the magnetism of excited states of exotic nuclei produced as radioactive beams.
- Published
- 2015
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49. Spins, electromagnetic moments, and isomers of (107-129)Cd.
- Author
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Yordanov DT, Balabanski DL, Bieroń J, Bissell ML, Blaum K, Budinčević I, Fritzsche S, Frömmgen N, Georgiev G, Geppert Ch, Hammen M, Kowalska M, Kreim K, Krieger A, Neugart R, Nörtershäuser W, Papuga J, and Schmidt S
- Abstract
The neutron-rich isotopes of cadmium up to the N=82 shell closure have been investigated by high-resolution laser spectroscopy. Deep-uv excitation at 214.5 nm and radioactive-beam bunching provided the required experimental sensitivity. Long-lived isomers are observed in (127)Cd and (129)Cd for the first time. One essential feature of the spherical shell model is unambiguously confirmed by a linear increase of the 11/2(-) quadrupole moments. Remarkably, this mechanism is found to act well beyond the h(11/2) shell.
- Published
- 2013
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50. Is the 7/2(1)- isomer state of 43S spherical?
- Author
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Chevrier R, Daugas JM, Gaudefroy L, Ichikawa Y, Ueno H, Hass M, Haas H, Cottenier S, Aoi N, Asahi K, Balabanski DL, Fukuda N, Furukawa T, Georgiev G, Hayashi H, Iijima H, Inabe N, Inoue T, Ishihara M, Ishii Y, Kameda D, Kubo T, Nanao T, Neyens G, Ohnishi T, Rajabali MM, Suzuki K, Takeda H, Tsuchiya M, Vermeulen N, Watanabe H, and Yoshimi A
- Abstract
We report on the spectroscopic quadrupole moment measurement of the 7/2(1)(-) isomeric state in (16)(43)S(27) [E*=320.5(5) keV, T(1/2)=415(3) ns], using the time dependent perturbed angular distribution technique at the RIKEN RIBF facility. Our value, |Q(s)|=23(3) efm(2), is larger than that expected for a single-particle state. Shell model calculations using the modern SDPF-U interaction for this mass region reproduce remarkably well the measured |Q(s)|, and show that non-negligible correlations drive the isomeric state away from a purely spherical shape.
- Published
- 2012
- Full Text
- View/download PDF
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