Evidence for a 3.8 MeV state in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mmultiscripts><mml:mi>Be</mml:mi><mml:mprescripts /><mml:none /><mml:mn>9</mml:mn></mml:mmultiscripts></mml:math>

Smith, Robin; Wheldon, C.; Freer, M.; Curtis, N.; Kokalova, Tz.; Aprahamian, A.; Ashwood, N. I.; Barr, M.; Bucher, B.; Copp, P.; Couder, M.; Fang, X.; Goldring, G.; Jung, F.; Lesher, S. R.; Lu, Wenting; Malcolm, J. D.; Roberts, A.; Tan, Wanpeng; Ziman, V.

doi:10.1103/physrevc.94.014320

Cited by 3 publications

(4 citation statements)

References 30 publications

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“…The experimental analysis is similar to that of Ref. [8], however, the specific condition that decays proceeded via the 8 Be ground state was not required. Hence, 9 Be excitation spectra were reconstructed for events which break up via any of the open channels.…”

Section: Application To Beryllium-9 Breakupmentioning

confidence: 87%

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Disentangling unclear nuclear breakup channels of beryllium-9 using the three-axis Dalitz plot

Smith

Freer

Wheldon

et al. 2017

J. Phys.: Conf. Ser.

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Abstract. The three-axis Dalitz plot has been applied to the breakup of a nucleus into unequal mass fragments for the first time. The Dalitz plot allows clear identification of the various breakup channels of 9 Be → 2α + n process. The method has allowed the branching ratio for the 6.38 MeV level in 9 Be to be provisionally calculated when examining the 9 Be( 4 He,α)ααn reaction. The effects of non-uniform angular distributions on the Dalitz plot must still be properly investigated along with the effects of contaminant reaction channels. It is proposed that this method could be used to determine the breakup branching ratio of a newly-measured level in this nucleus.

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Section: Application To Beryllium-9 Breakupmentioning

confidence: 87%

“…[8]). A new resonance was recorded at 3.8 MeV, and the necessity for reliable branching ratio measurements in order to determine the angular momentum of the state, was highlighted.…”

Section: Application To Beryllium-9 Breakupmentioning

confidence: 99%

Disentangling unclear nuclear breakup channels of beryllium-9 using the three-axis Dalitz plot

Smith

Freer

Wheldon

et al. 2017

J. Phys.: Conf. Ser.

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“…We briefly describe the numerical methods used to create the Figures 5-20. In all calculations involving matrix diagonalization, the circuit Hamiltonians are represented in a basis of harmonic oscillator eigenstates [35]. This basis is specified by the normal modes of the linear part of the Hamiltonian (i.e., the part independent of the Josephson junctions).…”

Section: A Numerical Methodsmentioning

confidence: 99%

Tunable inductive coupling of superconducting qubits in the strongly nonlinear regime

et al. 2017

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For a variety of superconducting qubits, tunable interactions are achieved through mutual inductive coupling to a coupler circuit containing a nonlinear Josephson element. In this paper we derive the general interaction mediated by such a circuit under the Born-Oppenheimer Approximation. This interaction naturally decomposes into a classical part, with origin in the classical circuit equations, and a quantum part, associated with the coupler's zero-point energy. Our result is nonperturbative in the qubit-coupler coupling strengths and in the coupler nonlinearity. This can lead to significant departures from previous, linear theories for the inter-qubit coupling, including nonstoquastic and many-body interactions. Our analysis provides explicit and efficiently computable series for any term in the interaction Hamiltonian and can be applied to any superconducting qubit type. We conclude with a numerical investigation of our theory using a case study of two coupled flux qubits, and in particular study the regime of validity of the Born-Oppenheimer Approximation. 2

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“…In the level scheme [8] (see Table 1) the excited states of the 2.78 MeV, 4.70 MeV, 5.59 MeV and 7.94 MeV in 9 Be nucleus have following spin-parity values 1 However, in 2015 an article [9] was published, where new spin-parity values for the above-mentioned excited states were determined: 3 − was observed in the 9 Be [11], which is an isobar analog of the 3.8 MeV state in 9 B. However, the question of the structure of this state was not raised.…”

Section: (): V-volmentioning

confidence: 99%

Structures of the excited states in $$^{9}$$Be studied by scattering of 23 MeV deuterons

et al. 2021

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Evidence for a 3.8 MeV state inBe9

Cited by 3 publications

References 30 publications

Disentangling unclear nuclear breakup channels of beryllium-9 using the three-axis Dalitz plot

Disentangling unclear nuclear breakup channels of beryllium-9 using the three-axis Dalitz plot

Tunable inductive coupling of superconducting qubits in the strongly nonlinear regime

Structures of the excited states in $$^{9}$$Be studied by scattering of 23 MeV deuterons

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