Decay Spectroscopy of Element 115 Daughters: 280Rg -> 276Mt and 276Mt -> 272Bh

J. M. Gates; K. E. Gregorich; O. R. Gothe; E. C. Uribe; G. K. Pang; D. L. Bleuel; M. Block; R. M. Clark; C. M. Campbell; H. L. Crawford; M. Cromaz; A. Di Nitto; Ch. E. Düllmann; N. E. Esker; Claes Fahlander; P. Fallon; R. M. Farjadi; Ulrika Forsberg; J. Khuyagbaatar; W. Loveland; A. O. Macchiavelli; E. M. May; P. R. Mudder; D. T. Olive; A. C. Rice; J. Rissanen; Dirk Rudolph; Luis Sarmiento; J. A. Shusterman; M. A. Stoyer; A. Wiens; A. Yakushev; H. Nitsche

doi:10.1103/PhysRevC.92.021301

Decay Spectroscopy of Element 115 Daughters: 280Rg -> 276Mt and 276Mt -> 272Bh

J. M. Gates, K. E. Gregorich, O. R. Gothe, E. C. Uribe, G. K. Pang, D. L. Bleuel, M. Block, R. M. Clark, C. M. Campbell, H. L. Crawford, M. Cromaz, A. Di Nitto, Ch. E. Düllmann, N. E. Esker, Claes Fahlander, P. Fallon, R. M. Farjadi, Ulrika Forsberg, J. Khuyagbaatar, W. LovelandA. O. Macchiavelli, E. M. May, P. R. Mudder, D. T. Olive, A. C. Rice, J. Rissanen, Dirk Rudolph, Luis Sarmiento, J. A. Shusterman, M. A. Stoyer, A. Wiens, A. Yakushev, H. Nitsche

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Abstract

Forty-six decay chains, assigned to the decay of 288-115, were produced using the 243Am(48Ca,3n)288-115 reaction at the Lawrence Berkeley National Laboratory 88-in. cyclotron. The resulting series of α decays were studied using α-photon and α-x-ray spectroscopies. Multiple α-photon coincidences were observed in the element 115 decay chain members, particularly in the third- and fourth-generation decays (presumed to be 280Rg and 276Mt, respectively). Upon combining these data with those from 22 288-115 decay chains observed in a similar experiment, updated level schemes in 276Mt and 272Bh (populated by the α decay of 280Rg and 276Mt, respectively) are proposed. Photons were observed in the energy range expected for K x rays coincident with the α decay of both 280Rg and 276Mt. However, Compton scattering of higher-energy γ rays and discrete transitions are present in the K x-ray region preventing a definitive Z identification to be made based on observation of characteristic K x-ray energies.

Original language	English
Article number	021301
Number of pages	6
Journal	Physical Review C (Nuclear Physics)
Volume	92
Issue number	2
DOIs	https://doi.org/10.1103/PhysRevC.92.021301
Publication status	Published - 2015

Subject classification (UKÄ)

Subatomic Physics

Free keywords

alpha decay
superheavy elements
element 115
gamma-ray spectroscopy

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10.1103/PhysRevC.92.021301

PhysRevC.92.021301-Full

http://link.aps.org/doi/10.1103/PhysRevC.92.021301

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Role of quasiparticle structure in α decay of superheavy nuclei
Clark, R. M. & Rudolph, D., 2023 Mar 31, In: Physical Review C. 107, 3, 11 p., 034321.
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Recoil-α-fission and recoil-α-α-fission events observed in the reaction ⁴⁸Ca + ²⁴³Am
Forsberg, U., Rudolph, D., Andersson, L. L., Di Nitto, A., Düllmann, C. E., Fahlander, C., Gates, J. M., Golubev, P., Gregorich, K. E., Gross, C. J., Herzberg, R. D., Heßberger, F. P., Khuyagbaatar, J., Kratz, J. V., Rykaczewski, K., Sarmiento, L. G., Schädel, M., Yakushev, A., Åberg, S. & Ackermann, D. & 34 others, Block, M., Brand, H., Carlsson, G., Cox, D., Derkx, X., Dobaczewski, J., Eberhardt, K., Even, J., Gerl, J., Jäger, E., Kindler, B., Krier, J., Kojouharov, I., Kurz, N., Lommel, B., Mistry, A., Mokry, C., Nazarewicz, W., Nitsche, H., Omtvedt, J. P., Papadakis, P., Ragnarsson, I., Runke, J., Schaffner, H., Schausten, B., Shi, Y., Thörle-Pospiech, P., Torres, T., Traut, T., Trautmann, N., Türler, A., Ward, A., Ward, D. E. & Wiehl, N., 2016 Sept 1, In: Nuclear Physics, Section A. 953, p. 117-138 22 p.
Research output: Contribution to journal › Article › peer-review
Spectroscopy of Element 115 Decay Chains
Rudolph, D., Forsberg, U., Golubev, P., Sarmiento, L., Yakushev, A., Andersson, L.-L., Di Nitto, A., Düllmann, C. E., Gates, J. M., Gregorich, K. E., Gross, C. J., Heßberger, F. P., Herzberg, R.-D., Khuyagbaatar, J., Kratz, J. V., Rykaczewski, K., Schädel, M., Åberg, S., Ackermann, D. & Block, M. & 31 others, Brand, H., Carlsson, G., Cox, D., Derkx, X., Eberhardt, K., Even, J., Fahlander, C., Gerl, J., Jäger, E., Kindler, B., Krier, J., Kojouharov, I., Kurz, N., Lommel, B., Mistry, A., Mokry, C., Nitsche, H., Omtvedt, J. P., Papadakis, P., Ragnarsson, I., Runke, J., Schaffner, H., Schausten, B., Thörle-Pospiech, P., Torres, T., Traut, T., Trautmann, N., Türler, A., Ward, A., Ward, D. & Wiehl, N., 2013, In: Physical Review Letters. 111, 11, 112502.
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Nuclear Structure at the Limits: Isotope-selective Spectroscopy
Rudolph, D. (PI), Fahlander, C. (CoI), Golubev, P. (CoI), Sarmiento Pico, L. (CoI), Cox, D. (Researcher), Hrabar, Y. (Research student), Såmark-Roth, A. (Research student), Forsberg, U. (Researcher), Lorenz, C. (Research student), Lalovic, N. (Researcher), Lalovic, N. (Research student), Forsberg, U. (Research student), Gellanki, J. (Research student), Hoischen, R. (Research student), Johansson, E. (Research student), Andersson, L.-L. (Research student), du Rietz, R. (Research student), Ekman, J. (Research student) & Andreoiu, C. (Research student)
Swedish Research Council
2002/01/01 → 2027/12/31
Project: Research

Cite this

Gates, J. M., Gregorich, K. E., Gothe, O. R., Uribe, E. C., Pang, G. K., Bleuel, D. L., Block, M., Clark, R. M., Campbell, C. M., Crawford, H. L., Cromaz, M., Di Nitto, A., Düllmann, C. E., Esker, N. E., Fahlander, C., Fallon, P., Farjadi, R. M., Forsberg, U., Khuyagbaatar, J., ... Nitsche, H. (2015). Decay Spectroscopy of Element 115 Daughters: 280Rg -> 276Mt and 276Mt -> 272Bh. Physical Review C (Nuclear Physics), 92(2), Article 021301. https://doi.org/10.1103/PhysRevC.92.021301

@article{d0081729de96455d9272c5bbd0150d17,

title = "Decay Spectroscopy of Element 115 Daughters: 280Rg -> 276Mt and 276Mt -> 272Bh",

abstract = "Forty-six decay chains, assigned to the decay of 288-115, were produced using the 243Am(48Ca,3n)288-115 reaction at the Lawrence Berkeley National Laboratory 88-in. cyclotron. The resulting series of α decays were studied using α-photon and α-x-ray spectroscopies. Multiple α-photon coincidences were observed in the element 115 decay chain members, particularly in the third- and fourth-generation decays (presumed to be 280Rg and 276Mt, respectively). Upon combining these data with those from 22 288-115 decay chains observed in a similar experiment, updated level schemes in 276Mt and 272Bh (populated by the α decay of 280Rg and 276Mt, respectively) are proposed. Photons were observed in the energy range expected for K x rays coincident with the α decay of both 280Rg and 276Mt. However, Compton scattering of higher-energy γ rays and discrete transitions are present in the K x-ray region preventing a definitive Z identification to be made based on observation of characteristic K x-ray energies.",

keywords = "alpha decay, superheavy elements, element 115, gamma-ray spectroscopy",

author = "Gates, {J. M.} and Gregorich, {K. E.} and Gothe, {O. R.} and Uribe, {E. C.} and Pang, {G. K.} and Bleuel, {D. L.} and M. Block and Clark, {R. M.} and Campbell, {C. M.} and Crawford, {H. L.} and M. Cromaz and {Di Nitto}, A. and D{\"u}llmann, {Ch. E.} and Esker, {N. E.} and Claes Fahlander and P. Fallon and Farjadi, {R. M.} and Ulrika Forsberg and J. Khuyagbaatar and W. Loveland and Macchiavelli, {A. O.} and May, {E. M.} and Mudder, {P. R.} and Olive, {D. T.} and Rice, {A. C.} and J. Rissanen and Dirk Rudolph and Luis Sarmiento and Shusterman, {J. A.} and Stoyer, {M. A.} and A. Wiens and A. Yakushev and H. Nitsche",

year = "2015",

doi = "10.1103/PhysRevC.92.021301",

language = "English",

volume = "92",

journal = "Physical Review C (Nuclear Physics)",

issn = "0556-2813",

publisher = "American Physical Society",

number = "2",

}

Gates, JM, Gregorich, KE, Gothe, OR, Uribe, EC, Pang, GK, Bleuel, DL, Block, M, Clark, RM, Campbell, CM, Crawford, HL, Cromaz, M, Di Nitto, A, Düllmann, CE, Esker, NE, Fahlander, C, Fallon, P, Farjadi, RM, Forsberg, U, Khuyagbaatar, J, Loveland, W, Macchiavelli, AO, May, EM, Mudder, PR, Olive, DT, Rice, AC, Rissanen, J, Rudolph, D , Sarmiento, L, Shusterman, JA, Stoyer, MA, Wiens, A, Yakushev, A & Nitsche, H 2015, 'Decay Spectroscopy of Element 115 Daughters: 280Rg -> 276Mt and 276Mt -> 272Bh', Physical Review C (Nuclear Physics), vol. 92, no. 2, 021301. https://doi.org/10.1103/PhysRevC.92.021301

TY - JOUR

T1 - Decay Spectroscopy of Element 115 Daughters: 280Rg -> 276Mt and 276Mt -> 272Bh

AU - Gates, J. M.

AU - Gregorich, K. E.

AU - Gothe, O. R.

AU - Uribe, E. C.

AU - Pang, G. K.

AU - Bleuel, D. L.

AU - Block, M.

AU - Clark, R. M.

AU - Campbell, C. M.

AU - Crawford, H. L.

AU - Cromaz, M.

AU - Di Nitto, A.

AU - Düllmann, Ch. E.

AU - Esker, N. E.

AU - Fahlander, Claes

AU - Fallon, P.

AU - Farjadi, R. M.

AU - Forsberg, Ulrika

AU - Khuyagbaatar, J.

AU - Loveland, W.

AU - Macchiavelli, A. O.

AU - May, E. M.

AU - Mudder, P. R.

AU - Olive, D. T.

AU - Rice, A. C.

AU - Rissanen, J.

AU - Rudolph, Dirk

AU - Sarmiento, Luis

AU - Shusterman, J. A.

AU - Stoyer, M. A.

AU - Wiens, A.

AU - Yakushev, A.

AU - Nitsche, H.

PY - 2015

Y1 - 2015

N2 - Forty-six decay chains, assigned to the decay of 288-115, were produced using the 243Am(48Ca,3n)288-115 reaction at the Lawrence Berkeley National Laboratory 88-in. cyclotron. The resulting series of α decays were studied using α-photon and α-x-ray spectroscopies. Multiple α-photon coincidences were observed in the element 115 decay chain members, particularly in the third- and fourth-generation decays (presumed to be 280Rg and 276Mt, respectively). Upon combining these data with those from 22 288-115 decay chains observed in a similar experiment, updated level schemes in 276Mt and 272Bh (populated by the α decay of 280Rg and 276Mt, respectively) are proposed. Photons were observed in the energy range expected for K x rays coincident with the α decay of both 280Rg and 276Mt. However, Compton scattering of higher-energy γ rays and discrete transitions are present in the K x-ray region preventing a definitive Z identification to be made based on observation of characteristic K x-ray energies.

AB - Forty-six decay chains, assigned to the decay of 288-115, were produced using the 243Am(48Ca,3n)288-115 reaction at the Lawrence Berkeley National Laboratory 88-in. cyclotron. The resulting series of α decays were studied using α-photon and α-x-ray spectroscopies. Multiple α-photon coincidences were observed in the element 115 decay chain members, particularly in the third- and fourth-generation decays (presumed to be 280Rg and 276Mt, respectively). Upon combining these data with those from 22 288-115 decay chains observed in a similar experiment, updated level schemes in 276Mt and 272Bh (populated by the α decay of 280Rg and 276Mt, respectively) are proposed. Photons were observed in the energy range expected for K x rays coincident with the α decay of both 280Rg and 276Mt. However, Compton scattering of higher-energy γ rays and discrete transitions are present in the K x-ray region preventing a definitive Z identification to be made based on observation of characteristic K x-ray energies.

KW - alpha decay

KW - superheavy elements

KW - element 115

KW - gamma-ray spectroscopy

U2 - 10.1103/PhysRevC.92.021301

DO - 10.1103/PhysRevC.92.021301

M3 - Article

SN - 0556-2813

VL - 92

JO - Physical Review C (Nuclear Physics)

JF - Physical Review C (Nuclear Physics)

IS - 2

M1 - 021301

ER -

Decay Spectroscopy of Element 115 Daughters: 280Rg -> 276Mt and 276Mt -> 272Bh

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Subject classification (UKÄ)

Free keywords

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Research output

Role of quasiparticle structure in α decay of superheavy nuclei

Recoil-α-fission and recoil-α-α-fission events observed in the reaction 48Ca + 243Am

Spectroscopy of Element 115 Decay Chains

Projects

Nuclear Structure at the Limits: Isotope-selective Spectroscopy

Cite this

Recoil-α-fission and recoil-α-α-fission events observed in the reaction ⁴⁸Ca + ²⁴³Am