Low collectivity of the first 2+              states of              212,210Po

D. Kocheva; G. Rainovski; J. Jolie; N. Pietralla; A. Blazhev; A. Astier; R. Altenkirch; M. Bast; M. Beckers; S. Ansari; Th. Braunroth; M. Cappellazzo; M.l. Cortés; A. Dewald; F. Diel; M. Djongolov; C. Fransen; K. Gladnishki; A. Goldkuhle; A. Hennig; V. Karayonchev; J.M. Keatings; E. Kluge; Th. Kröll; J. Litzinger; K. Moschner; C. Müller-Gatermann; P. Petkov; M. Rudigier; M. Scheck; P. Spagnoletti; Ph. Scholz; T. Schmidt; M. Spieker; C. Stahl; R. Stegmann; A. Stolz; A. Vogt; M. Stoyanova; P. Thöle; N. Warr; V. Werner; W. Witt; D. Wölk; J.C. Zamora; K.O. Zell; P. Van Isacker; V.Yu. Ponomarev

doi:10.1088/1742-6596/1023/1/012019

Low collectivity of the first 2⁺ states of ^212,210Po

D. Kocheva, G. Rainovski, J. Jolie, N. Pietralla, A. Blazhev, A. Astier, R. Altenkirch, M. Bast, M. Beckers, S. Ansari, Th. Braunroth, M. Cappellazzo, M.l. Cortés, A. Dewald, F. Diel, M. Djongolov, C. Fransen, K. Gladnishki, A. Goldkuhle, A. HennigV. Karayonchev, J.M. Keatings, E. Kluge, Th. Kröll, J. Litzinger, K. Moschner, C. Müller-Gatermann, P. Petkov, M. Rudigier, M. Scheck, P. Spagnoletti, Ph. Scholz, T. Schmidt, M. Spieker, C. Stahl, R. Stegmann, A. Stolz, A. Vogt, M. Stoyanova, P. Thöle, N. Warr, V. Werner, W. Witt, D. Wölk, J.C. Zamora, K.O. Zell, P. Van Isacker, V.Yu. Ponomarev

School of Computing, Engineering and Physical Sciences

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

Abstract

The lifetimes of the first 2⁺ excited states of ^212,210Po were measured in two transfer reactions ²⁰⁸Pb(¹²C,⁸Be)²¹²Po and ²⁰⁸Pb(¹²C,¹⁰Be)²¹⁰Po by the Recoil Distance Doppler Shift (RDDS) method and by the Doppler Shift Attenuation method (DSAM), respectively. The derived absolute B(E2) values of 2.6(3) W.u. for ²¹²Po and 1.83(28) W.u. for ²¹⁰Po indicate low collectivity. It is shown that the properties of the yrast 2₁⁺, 4₁⁺, 6₁⁺ and 8₁⁺ states in both nuclei cannot be described consistently in the framework of nuclear shell models. It is also demonstrated in the case of ²¹⁰Po that Quasi-particle Phonon Model (QPM) calculations cannot overcome this problem thus indicating the existence of a peculiarity which is neglected in both theoretical approaches.

Original language	English
Title of host publication	XXII International School on Nuclear Physics, Neutron Physics and Applications 10–16 September 2017, Varna, Bulgaria
Publisher	IOP Publishing
Volume	1023
DOIs	https://doi.org/10.1088/1742-6596/1023/1/012019
Publication status	Published - 1 May 2018

Publication series

Name	Journal of Physics: Conference Series
Publisher	IOP Publishing
ISSN (Print)	1742-6588

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Kocheva, D., Rainovski, G., Jolie, J., Pietralla, N., Blazhev, A., Astier, A., Altenkirch, R., Bast, M., Beckers, M., Ansari, S., Braunroth, T., Cappellazzo, M., Cortés, M. L., Dewald, A., Diel, F., Djongolov, M., Fransen, C., Gladnishki, K., Goldkuhle, A., ... Ponomarev, V. Y. (2018). Low collectivity of the first 2⁺ states of ^212,210Po. In XXII International School on Nuclear Physics, Neutron Physics and Applications 10–16 September 2017, Varna, Bulgaria (Vol. 1023). Article 012019 (Journal of Physics: Conference Series). IOP Publishing. https://doi.org/10.1088/1742-6596/1023/1/012019

@inproceedings{02b16b5907f54bdb818a288fa882b8f8,

title = "Low collectivity of the first 2+ states of 212,210Po",

abstract = "The lifetimes of the first 2+ excited states of 212,210Po were measured in two transfer reactions 208Pb(12C,8Be)212Po and 208Pb(12C,10Be)210Po by the Recoil Distance Doppler Shift (RDDS) method and by the Doppler Shift Attenuation method (DSAM), respectively. The derived absolute B(E2) values of 2.6(3) W.u. for 212Po and 1.83(28) W.u. for 210Po indicate low collectivity. It is shown that the properties of the yrast 21+, 41+, 61+ and 81+ states in both nuclei cannot be described consistently in the framework of nuclear shell models. It is also demonstrated in the case of 210Po that Quasi-particle Phonon Model (QPM) calculations cannot overcome this problem thus indicating the existence of a peculiarity which is neglected in both theoretical approaches.",

author = "D. Kocheva and G. Rainovski and J. Jolie and N. Pietralla and A. Blazhev and A. Astier and R. Altenkirch and M. Bast and M. Beckers and S. Ansari and Th. Braunroth and M. Cappellazzo and M.l. Cort{\'e}s and A. Dewald and F. Diel and M. Djongolov and C. Fransen and K. Gladnishki and A. Goldkuhle and A. Hennig and V. Karayonchev and J.M. Keatings and E. Kluge and Th. Kr{\"o}ll and J. Litzinger and K. Moschner and C. M{\"u}ller-Gatermann and P. Petkov and M. Rudigier and M. Scheck and P. Spagnoletti and Ph. Scholz and T. Schmidt and M. Spieker and C. Stahl and R. Stegmann and A. Stolz and A. Vogt and M. Stoyanova and P. Th{\"o}le and N. Warr and V. Werner and W. Witt and D. W{\"o}lk and J.C. Zamora and K.O. Zell and {Van Isacker}, P. and V.Yu. Ponomarev",

year = "2018",

month = may,

day = "1",

doi = "10.1088/1742-6596/1023/1/012019",

language = "English",

volume = "1023",

series = "Journal of Physics: Conference Series",

publisher = "IOP Publishing",

booktitle = "XXII International School on Nuclear Physics, Neutron Physics and Applications 10–16 September 2017, Varna, Bulgaria",

}

Kocheva, D, Rainovski, G, Jolie, J, Pietralla, N, Blazhev, A, Astier, A, Altenkirch, R, Bast, M, Beckers, M, Ansari, S, Braunroth, T, Cappellazzo, M, Cortés, ML, Dewald, A, Diel, F, Djongolov, M, Fransen, C, Gladnishki, K, Goldkuhle, A, Hennig, A, Karayonchev, V, Keatings, JM, Kluge, E, Kröll, T, Litzinger, J, Moschner, K, Müller-Gatermann, C, Petkov, P, Rudigier, M, Scheck, M, Spagnoletti, P, Scholz, P, Schmidt, T, Spieker, M, Stahl, C, Stegmann, R, Stolz, A, Vogt, A, Stoyanova, M, Thöle, P, Warr, N, Werner, V, Witt, W, Wölk, D, Zamora, JC, Zell, KO, Van Isacker, P & Ponomarev, VY 2018, Low collectivity of the first 2⁺ states of ^212,210Po. in XXII International School on Nuclear Physics, Neutron Physics and Applications 10–16 September 2017, Varna, Bulgaria. vol. 1023, 012019, Journal of Physics: Conference Series, IOP Publishing. https://doi.org/10.1088/1742-6596/1023/1/012019

Low collectivity of the first 2⁺ states of ^212,210Po. / Kocheva, D.; Rainovski, G.; Jolie, J. et al.
XXII International School on Nuclear Physics, Neutron Physics and Applications 10–16 September 2017, Varna, Bulgaria. Vol. 1023 IOP Publishing, 2018. 012019 (Journal of Physics: Conference Series).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

TY - GEN

T1 - Low collectivity of the first 2+ states of 212,210Po

AU - Kocheva, D.

AU - Rainovski, G.

AU - Jolie, J.

AU - Pietralla, N.

AU - Blazhev, A.

AU - Astier, A.

AU - Altenkirch, R.

AU - Bast, M.

AU - Beckers, M.

AU - Ansari, S.

AU - Braunroth, Th.

AU - Cappellazzo, M.

AU - Cortés, M.l.

AU - Dewald, A.

AU - Diel, F.

AU - Djongolov, M.

AU - Fransen, C.

AU - Gladnishki, K.

AU - Goldkuhle, A.

AU - Hennig, A.

AU - Karayonchev, V.

AU - Keatings, J.M.

AU - Kluge, E.

AU - Kröll, Th.

AU - Litzinger, J.

AU - Moschner, K.

AU - Müller-Gatermann, C.

AU - Petkov, P.

AU - Rudigier, M.

AU - Scheck, M.

AU - Spagnoletti, P.

AU - Scholz, Ph.

AU - Schmidt, T.

AU - Spieker, M.

AU - Stahl, C.

AU - Stegmann, R.

AU - Stolz, A.

AU - Vogt, A.

AU - Stoyanova, M.

AU - Thöle, P.

AU - Warr, N.

AU - Werner, V.

AU - Witt, W.

AU - Wölk, D.

AU - Zamora, J.C.

AU - Zell, K.O.

AU - Van Isacker, P.

AU - Ponomarev, V.Yu.

PY - 2018/5/1

Y1 - 2018/5/1

N2 - The lifetimes of the first 2+ excited states of 212,210Po were measured in two transfer reactions 208Pb(12C,8Be)212Po and 208Pb(12C,10Be)210Po by the Recoil Distance Doppler Shift (RDDS) method and by the Doppler Shift Attenuation method (DSAM), respectively. The derived absolute B(E2) values of 2.6(3) W.u. for 212Po and 1.83(28) W.u. for 210Po indicate low collectivity. It is shown that the properties of the yrast 21+, 41+, 61+ and 81+ states in both nuclei cannot be described consistently in the framework of nuclear shell models. It is also demonstrated in the case of 210Po that Quasi-particle Phonon Model (QPM) calculations cannot overcome this problem thus indicating the existence of a peculiarity which is neglected in both theoretical approaches.

AB - The lifetimes of the first 2+ excited states of 212,210Po were measured in two transfer reactions 208Pb(12C,8Be)212Po and 208Pb(12C,10Be)210Po by the Recoil Distance Doppler Shift (RDDS) method and by the Doppler Shift Attenuation method (DSAM), respectively. The derived absolute B(E2) values of 2.6(3) W.u. for 212Po and 1.83(28) W.u. for 210Po indicate low collectivity. It is shown that the properties of the yrast 21+, 41+, 61+ and 81+ states in both nuclei cannot be described consistently in the framework of nuclear shell models. It is also demonstrated in the case of 210Po that Quasi-particle Phonon Model (QPM) calculations cannot overcome this problem thus indicating the existence of a peculiarity which is neglected in both theoretical approaches.

U2 - 10.1088/1742-6596/1023/1/012019

DO - 10.1088/1742-6596/1023/1/012019

M3 - Conference contribution

VL - 1023

T3 - Journal of Physics: Conference Series

BT - XXII International School on Nuclear Physics, Neutron Physics and Applications 10–16 September 2017, Varna, Bulgaria

PB - IOP Publishing

ER -

Kocheva D, Rainovski G, Jolie J, Pietralla N, Blazhev A, Astier A et al. Low collectivity of the first 2⁺ states of ^212,210Po. In XXII International School on Nuclear Physics, Neutron Physics and Applications 10–16 September 2017, Varna, Bulgaria. Vol. 1023. IOP Publishing. 2018. 012019. (Journal of Physics: Conference Series). doi: 10.1088/1742-6596/1023/1/012019

Low collectivity of the first 2+ states of 212,210Po

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Low collectivity of the first 2⁺ states of ^212,210Po