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Physica Scripta Volume 1 Issue 5-6

Subject Areas: Mathematical Physics; ; ; ;
ISSN: 0031-8949
SJR: 85

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Journal Article

Eigenfunction Expansions Associated with Unitary Irreducible Representations of SU(1,1)

Lindblad, G

1970 Physica Scripta

doi:10.1088/0031-8949/1/5-6/001

The noncompact group SU(1,1) has three types of parametrizations associated with the three classes of one-parameter subgroups. Each of them gives rise to an expansion into matrix elements which are eigenfunctions of the differential operator associated with the Casimir invariant. The two cases...
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Journal Article

Decomposition of the Tensor Product of two Imaginary Mass Representations of the Poincaré Group

Lindblad, G

1970 Physica Scripta

doi:10.1088/0031-8949/1/5-6/002

The reduction of the tensor product is carried out by a method that is completely analogous to that used for real mass representations in the helicity coupling. This is possible through the use of a continuous basis for the UIRs of the little group SU(1,1). The Clebsch-Gordan coefficients are...
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Journal Article

Current Algebra on the Mass-shell

Snellman, H

1970 Physica Scripta

doi:10.1088/0031-8949/1/5-6/003

Pion-nucleon scattering on the mass-shell is studied in a field-theoretical framework where the weak currents together with their divergences are taken as interpolating fields for mesons and where the currents obey the Gell-Mann current-algebra (CA) scheme. On the mass-shell the PCAC assumption...
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Journal Article

Parametrization of Scattering Amplitudes: Definition of Crossing Symmetric Measure and Inertial Tensor

Eriksson, Karl-Erik

1970 Physica Scripta

doi:10.1088/0031-8949/1/5-6/004

The parametrization of N-point functions and scattering amplitudes in a relativistic particle theory is briefly discussed. A "democratic" parametrization is suggested. In connection with this a 4-dimensional "tensor of inertia" is defined in close connection to the Gram matrix. A measure is...
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Journal Article

On Kinematic Singularities of Transversity Amplitudes

Johannesson, Nils

1970 Physica Scripta

doi:10.1088/0031-8949/1/5-6/005

A method given by Trueman for obtaining the kinematic singularities of helicity amplitudes is applied to the transversity amplitudes introduced by Kotánski.The results are in agreement with those found by other methods. In two cases, viz. the physical boundary singularities and the s = 0...
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Journal Article

Energy Levels in 70Ga

Sawa, Zdzislaw P

1970 Physica Scripta

doi:10.1088/0031-8949/1/5-6/006

The spectrum of energy levels in 70Ga was investigated by Morozow and Yampolskij [1] and, more systematically, by Rester, Durham and Class [2] who employed the 70Zn[p,n]70Ga reaction and deduced 4 excited levels in 70Ga from the study of conversion electrons and gamma-rays. The present...
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Journal Article

Nuclear Magnetic Moment and Hyperfine Structure Anomaly of 103Ag and Nuclear Spin of 13 m 102Ag

Wannberg, B; Jönsson, J O; Sanner, L

1970 Physica Scripta

doi:10.1088/0031-8949/1/5-6/007

The hfs of 103Ag (T1/2 = 66 min) has been investigated with the atomic-beam magnetic-resonance (ABMR) method. and I have been determined independently, and the results are = 39 700 (500) MHz and I = + 4.45 (5) n.m. The hfs anomaly 107103 has been determined to be + 3.4 (1.7)%. Theoretical...
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Journal Article

Evidence for an Isomeric 29/2+ Level in 211At

Bergström, I; Fant, B; Herrlander, C J; Wikström, K; Blomqvist, J

1970 Physica Scripta

doi:10.1088/0031-8949/1/5-6/008

A 70 ns isomeric state at 2 641 keV has been produced in the 209Bi(,2n)211 At reaction and interpreted as the 29/2+ state of the h9/22 i13/2 proton configuration. It decays to the states (h9/22 f7/2)23/2, (h9/23)21/2, (h9/23)17/2, (h9/23)13/2 and (h9/23)9/2 by a straight cascade of transitions...
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Journal Article

Remeasured Wavelengths of Some Resonance Lines of Be III, B IV, C V and O VII

Svensson, Lars Åke

1970 Physica Scripta

doi:10.1088/0031-8949/1/5-6/009

Twelve lines in the region 20-100 Å, belonging to the resonance series of Be III, B IV, C V and O VII, have been remeasured by using plates taken by Tyrén. Wavelengths are given to four decimal places.
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Journal Article

Measured 86Kr I Wavelengths for a Microwave-excited Electrodeless Lamp

Eriksson, Karl B S; Norlén, Göran

1970 Physica Scripta

doi:10.1088/0031-8949/1/5-6/010

The wavelengths of 34 strong transitions in 86Kr I, emitted by an air-cooled electrodeless Engelhard lamp excited in a cavity resonator, have been measured. The estimated uncertainty ranges from ±5 to ±15 × 10-5 Å between 5 563 and 9 755 Å. Relative level values have been derived with an...

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