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Start Over Author "Sandzelius, M." Journal physical review letters
12 results on '"Sandzelius, M."'

1. Nanosecond-Scale Proton Emission from Strongly Oblate-Deformed Lu149

Author

Auranen, K., primary, Briscoe, A. D., additional, Ferreira, L. S., additional, Grahn, T., additional, Greenlees, P. T., additional, Herzáň, A., additional, Illana, A., additional, Joss, D. T., additional, Joukainen, H., additional, Julin, R., additional, Jutila, H., additional, Leino, M., additional, Louko, J., additional, Luoma, M., additional, Maglione, E., additional, Ojala, J., additional, Page, R. D., additional, Pakarinen, J., additional, Rahkila, P., additional, Romero, J., additional, Ruotsalainen, P., additional, Sandzelius, M., additional, Sarén, J., additional, Tolosa-Delgado, A., additional, Uusitalo, J., additional, and Zimba, G., additional

Published
2022
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2. Nanosecond-Scale Proton Emission from Strongly Oblate-Deformed ^{149}Lu

Author

Auranen, K., Briscoe, A. D., Ferreira, L. S., Grahn, T., Greenlees, P. T., Herzáň, A., Illana, A., Joss, D. T., Joukainen, H., Julin, R., Jutila, H., Leino, M., Louko, J., Luoma, M., Maglione, E., Ojala, J., Page, R. D., Pakarinen, J., Rahkila, P., Romero, J., Ruotsalainen, P., Sandzelius, M., Sarén, J., Tolosa-Delgado, A., Uusitalo, J., and Zimba, G.

Subjects
protonit, Physics::Accelerator Physics, Nuclear Experiment, ydinfysiikka, emissio (fysiikka)
Abstract

Using the fusion-evaporation reaction ^{96}Ru(^{58}Ni,p4n)^{149}Lu and the MARA vacuum-mode recoil separator, a new proton-emitting isotope ^{149}Lu has been identified. The measured decay Q value of 1920(20) keV is the highest measured for a ground-state proton decay, and it naturally leads to the shortest directly measured half-life of 450_{-100}^{+170} ns for a ground-state proton emitter. The decay rate is consistent with l_{p}=5 emission, suggesting a dominant πh_{11/2} component for the wave function of the proton-emitting state. Through nonadiabatic quasiparticle calculations it was concluded that ^{149}Lu is the most oblate deformed proton emitter observed to date.

Published
2021

3. Lifetime Measurements of Excited States in Pt172 and the Variation of Quadrupole Transition Strength with Angular Momentum

Author

Cederwall, B., primary, Doncel, M., additional, Aktas, Ö., additional, Ertoprak, A., additional, Liotta, R., additional, Qi, C., additional, Grahn, T., additional, Cullen, D. M, additional, Hodge, D., additional, Giles, M., additional, Stolze, S., additional, Badran, H., additional, Braunroth, T., additional, Calverley, T., additional, Cox, D. M., additional, Fang, Y. D., additional, Greenlees, P. T., additional, Hilton, J., additional, Ideguchi, E., additional, Julin, R., additional, Juutinen, S., additional, Raju, M. Kumar, additional, Li, H., additional, Liu, H., additional, Matta, S., additional, Modamio, V., additional, Pakarinen, J., additional, Papadakis, P., additional, Partanen, J., additional, Petrache, C. M., additional, Rahkila, P., additional, Ruotsalainen, P., additional, Sandzelius, M., additional, Sarén, J., additional, Scholey, C., additional, Sorri, J., additional, Subramaniam, P., additional, Taylor, M. J., additional, Uusitalo, J., additional, and Valiente-Dobón, J. J., additional

Published
2018
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4. Blurring the Boundaries: Decays of Multiparticle Isomers at the Proton Drip Line

Author

Carroll, R. J., primary, Page, R. D., additional, Joss, D. T., additional, Uusitalo, J., additional, Darby, I. G., additional, Andgren, K., additional, Cederwall, B., additional, Eeckhaudt, S., additional, Grahn, T., additional, Gray-Jones, C., additional, Greenlees, P. T., additional, Hadinia, B., additional, Jones, P. M., additional, Julin, R., additional, Juutinen, S., additional, Leino, M., additional, Leppänen, A.-P., additional, Nyman, M., additional, O’Donnell, D., additional, Pakarinen, J., additional, Rahkila, P., additional, Sandzelius, M., additional, Sarén, J., additional, Scholey, C., additional, Seweryniak, D., additional, and Simpson, J., additional

Published
2014
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5. Shell-Structure and Pairing Interaction in Superheavy Nuclei: Rotational Properties of theZ=104NucleusRf256

Author

Greenlees, P. T., primary, Rubert, J., additional, Piot, J., additional, Gall, B. J. P., additional, Andersson, L. L., additional, Asai, M., additional, Asfari, Z., additional, Cox, D. M., additional, Dechery, F., additional, Dorvaux, O., additional, Grahn, T., additional, Hauschild, K., additional, Henning, G., additional, Herzan, A., additional, Herzberg, R.-D., additional, Heßberger, F. P., additional, Jakobsson, U., additional, Jones, P., additional, Julin, R., additional, Juutinen, S., additional, Ketelhut, S., additional, Khoo, T.-L., additional, Leino, M., additional, Ljungvall, J., additional, Lopez-Martens, A., additional, Lozeva, R., additional, Nieminen, P., additional, Pakarinen, J., additional, Papadakis, P., additional, Parr, E., additional, Peura, P., additional, Rahkila, P., additional, Rinta-Antila, S., additional, Ruotsalainen, P., additional, Sandzelius, M., additional, Sarén, J., additional, Scholey, C., additional, Seweryniak, D., additional, Sorri, J., additional, Sulignano, B., additional, Theisen, Ch., additional, Uusitalo, J., additional, and Venhart, M., additional

Published
2012
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6. γ-Ray Spectroscopy at the Limits: First Observation of Rotational Bands inLr255

Author

Ketelhut, S., primary, Greenlees, P. T., additional, Ackermann, D., additional, Antalic, S., additional, Clément, E., additional, Darby, I. G., additional, Dorvaux, O., additional, Drouart, A., additional, Eeckhaudt, S., additional, Gall, B. J. P., additional, Görgen, A., additional, Grahn, T., additional, Gray-Jones, C., additional, Hauschild, K., additional, Herzberg, R.-D., additional, Heßberger, F. P., additional, Jakobsson, U., additional, Jones, G. D., additional, Jones, P., additional, Julin, R., additional, Juutinen, S., additional, Khoo, T.-L., additional, Korten, W., additional, Leino, M., additional, Leppänen, A.-P., additional, Ljungvall, J., additional, Moon, S., additional, Nyman, M., additional, Obertelli, A., additional, Pakarinen, J., additional, Parr, E., additional, Papadakis, P., additional, Peura, P., additional, Piot, J., additional, Pritchard, A., additional, Rahkila, P., additional, Rostron, D., additional, Ruotsalainen, P., additional, Sandzelius, M., additional, Sarén, J., additional, Scholey, C., additional, Sorri, J., additional, Steer, A., additional, Sulignano, B., additional, Theisen, Ch., additional, Uusitalo, J., additional, Venhart, M., additional, Zielinska, M., additional, Bender, M., additional, and Heenen, P.-H., additional

Published
2009
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7. Identification of Excited States in theTz=1NucleusXe110: Evidence for Enhanced Collectivity near theN=Z=50Double Shell Closure

Author

Sandzelius, M., primary, Hadinia, B., additional, Cederwall, B., additional, Andgren, K., additional, Ganioğlu, E., additional, Darby, I. G., additional, Dimmock, M. R., additional, Eeckhaudt, S., additional, Grahn, T., additional, Greenlees, P. T., additional, Ideguchi, E., additional, Jones, P. M., additional, Joss, D. T., additional, Julin, R., additional, Juutinen, S., additional, Khaplanov, A., additional, Leino, M., additional, Nelson, L., additional, Niikura, M., additional, Nyman, M., additional, Page, R. D., additional, Pakarinen, J., additional, Paul, E. S., additional, Petri, M., additional, Rahkila, P., additional, Sarén, J., additional, Scholey, C., additional, Sorri, J., additional, Uusitalo, J., additional, Wadsworth, R., additional, and Wyss, R., additional

Published
2007
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8. Collectivity and Configuration Mixing inPb186,188andPo194

Author

Grahn, T., primary, Dewald, A., additional, Möller, O., additional, Julin, R., additional, Beausang, C. W., additional, Christen, S., additional, Darby, I. G., additional, Eeckhaudt, S., additional, Greenlees, P. T., additional, Görgen, A., additional, Helariutta, K., additional, Jolie, J., additional, Jones, P., additional, Juutinen, S., additional, Kettunen, H., additional, Kröll, T., additional, Krücken, R., additional, Coz, Y. Le, additional, Leino, M., additional, Leppänen, A.-P., additional, Maierbeck, P., additional, Meyer, D. A., additional, Melon, B., additional, Nieminen, P., additional, Nyman, M., additional, Page, R. D., additional, Pakarinen, J., additional, Petkov, P., additional, Rahkila, P., additional, Saha, B., additional, Sandzelius, M., additional, Sarén, J., additional, Scholey, C., additional, and Uusitalo, J., additional

Published
2006
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9. Nanosecond-Scale Proton Emission from Strongly Oblate-Deformed ^{149}Lu.

Author

Auranen K, Briscoe AD, Ferreira LS, Grahn T, Greenlees PT, Herzáň A, Illana A, Joss DT, Joukainen H, Julin R, Jutila H, Leino M, Louko J, Luoma M, Maglione E, Ojala J, Page RD, Pakarinen J, Rahkila P, Romero J, Ruotsalainen P, Sandzelius M, Sarén J, Tolosa-Delgado A, Uusitalo J, and Zimba G

Abstract

Using the fusion-evaporation reaction ^{96}Ru(^{58}Ni,p4n)^{149}Lu and the MARA vacuum-mode recoil separator, a new proton-emitting isotope ^{149}Lu has been identified. The measured decay Q value of 1920(20) keV is the highest measured for a ground-state proton decay, and it naturally leads to the shortest directly measured half-life of 450_{-100}^{+170}  ns for a ground-state proton emitter. The decay rate is consistent with l_{p}=5 emission, suggesting a dominant πh_{11/2} component for the wave function of the proton-emitting state. Through nonadiabatic quasiparticle calculations it was concluded that ^{149}Lu is the most oblate deformed proton emitter observed to date.

Published
2022
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10. Lifetime Measurements of Excited States in ^{172}Pt and the Variation of Quadrupole Transition Strength with Angular Momentum.

Author

Cederwall B, Doncel M, Aktas Ö, Ertoprak A, Liotta R, Qi C, Grahn T, Cullen DM, Hodge D, Giles M, Stolze S, Badran H, Braunroth T, Calverley T, Cox DM, Fang YD, Greenlees PT, Hilton J, Ideguchi E, Julin R, Juutinen S, Raju MK, Li H, Liu H, Matta S, Modamio V, Pakarinen J, Papadakis P, Partanen J, Petrache CM, Rahkila P, Ruotsalainen P, Sandzelius M, Sarén J, Scholey C, Sorri J, Subramaniam P, Taylor MJ, Uusitalo J, and Valiente-Dobón JJ

Abstract

Lifetimes of the first excited 2^{+} and 4^{+} states in the extremely neutron-deficient nuclide ^{172}Pt have been measured for the first time using the recoil-distance Doppler shift and recoil-decay tagging techniques. An unusually low value of the ratio B(E2:4_{1}^{+}→2_{1}^{+})/B(E2:2_{1}^{+}→0_{gs}^{+})=0.55(19) was found, similar to a handful of other such anomalous cases observed in the entire Segré chart. The observation adds to a cluster of a few extremely neutron-deficient nuclides of the heavy transition metals with neutron numbers N≈90-94 featuring the effect. No theoretical model calculations reported to date have been able to explain the anomalously low B(E2:4_{1}^{+}→2_{1}^{+})/B(E2:2_{1}^{+}→0_{gs}^{+}) ratios observed in these cases. Such low values cannot, e.g., be explained within the framework of the geometrical collective model or by algebraic approaches within the interacting boson model framework. It is proposed that the group of B(E2:4_{1}^{+}→2_{1}^{+})/B(E2:2_{1}^{+}→0_{gs}^{+}) ratios in the extremely neutron-deficient even-even W, Os, and Pt nuclei around neutron numbers N≈90-94 reveal a quantum phase transition from a seniority-conserving structure to a collective regime as a function of neutron number. Although a system governed by seniority symmetry is the only theoretical framework for which such an effect may naturally occur, the phenomenon is highly unexpected for these nuclei that are not situated near closed shells.

Published
2018
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11. Gamma-ray spectroscopy at the limits: first observation of rotational bands in 255Lr.

Author

Ketelhut S, Greenlees PT, Ackermann D, Antalic S, Clément E, Darby IG, Dorvaux O, Drouart A, Eeckhaudt S, Gall BJ, Görgen A, Grahn T, Gray-Jones C, Hauschild K, Herzberg RD, Hessberger FP, Jakobsson U, Jones GD, Jones P, Julin R, Juutinen S, Khoo TL, Korten W, Leino M, Leppänen AP, Ljungvall J, Moon S, Nyman M, Obertelli A, Pakarinen J, Parr E, Papadakis P, Peura P, Piot J, Pritchard A, Rahkila P, Rostron D, Ruotsalainen P, Sandzelius M, Sarén J, Scholey C, Sorri J, Steer A, Sulignano B, Theisen Ch, Uusitalo J, Venhart M, Zielinska M, Bender M, and Heenen PH

Abstract

The rotational band structure of 255Lr has been investigated using advanced in-beam gamma-ray spectroscopic techniques. To date, 255Lr is the heaviest nucleus to be studied in this manner. One rotational band has been unambiguously observed and strong evidence for a second rotational structure was found. The structures are tentatively assigned to be based on the 1/2-[521] and 7/2-[514] Nilsson states, consistent with assignments from recently obtained alpha decay data. The experimental rotational band dynamic moment of inertia is used to test self-consistent mean-field calculations using the Skyrme SLy4 interaction and a density-dependent pairing force.

Published
2009
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12. Identification of excited states in the T(z) = 1 nucleus (110)Xe: evidence for enhanced collectivity near the N=Z=50 double shell closure.

Author

Sandzelius M, Hadinia B, Cederwall B, Andgren K, Ganioğlu E, Darby IG, Dimmock MR, Eeckhaudt S, Grahn T, Greenlees PT, Ideguchi E, Jones PM, Joss DT, Julin R, Juutinen S, Khaplanov A, Leino M, Nelson L, Niikura M, Nyman M, Page RD, Pakarinen J, Paul ES, Petri M, Rahkila P, Sarén J, Scholey C, Sorri J, Uusitalo J, Wadsworth R, and Wyss R

Abstract

Gamma-ray transitions have been identified for the first time in the extremely neutron-deficient (N=Z+2) nucleus (110)Xe, and the energies of the three lowest excited states in the ground-state band have been deduced. The results establish a breaking of the normal trend of increasing first excited 2(+) and 4(+) level energies as a function of the decreasing neutron number as the N=50 major shell gap is approached for the neutron-deficient Xe isotopes. This unusual feature is suggested to be an effect of enhanced collectivity, possibly arising from isoscalar n-p interactions becoming increasingly important close to the N=Z line.

Published
2007
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