A new measurement of s-wave scattering length of metastable helium atoms by photoassociative spectroscopy

2006 ◽  
Author(s):  
Jaewan Kim ◽  
S. Moal ◽  
M. Portier ◽  
M. Leduc ◽  
C. Cohen-Tannoudji ◽  
...  
Keyword(s):  
Wave Scattering ◽  
Scattering Length ◽  
S Wave ◽  
Metastable Helium ◽  
Helium Atoms

scholarly journals s -wave scattering length of a Gaussian potential

2018 ◽  
Vol 97 (4) ◽  
Author(s):  
Peter Jeszenszki ◽  
Alexander Yu. Cherny ◽  
Joachim Brand
Keyword(s):  
Wave Scattering ◽  
Scattering Length ◽  
S Wave ◽  
Gaussian Potential

scholarly journals Dark Solitons in the Unitary Bose Gas

Symmetry ◽  
2020 ◽  
Vol 12 (6) ◽  
pp. 957
Author(s):  
Martino Calzavara ◽  
Luca Salasnich
Keyword(s):  
Wave Scattering ◽  
Scattering Length ◽  
Bose Gas ◽  
Hydrodynamic Equations ◽  
S Wave ◽  
Universal Equation ◽  
One Dimensional ◽  
Dark Solitons ◽  
Harmonic Confinement ◽  
Analytical Formulas

We study the dilute and ultracold unitary Bose gas, characterized by a universal equation of state due to the diverging s-wave scattering length, under a transverse harmonic confinement. From the hydrodynamic equations of superfluids we derive an effective one-dimensional nonpolynomial Schrödinger equation (1D NPSE) for the axial wavefunction which, however, also takes into account the transverse wavefunction. By solving the 1D NPSE we obtain meaningful analytical formulas for the dark (gray and black) solitons of the bosonic system.

The n-n S-wave scattering length from the neutron spectra of the reaction π− +d → 2n+γ

1975 ◽  
Vol 254 (2) ◽  
pp. 241-268 ◽  
Author(s):  
R.M. Salter ◽  
R.P. Haddock ◽  
M. Zeller ◽  
D.R. Nygren ◽  
J.B. Czirr
Keyword(s):  
Wave Scattering ◽  
Scattering Length ◽  
S Wave ◽  
Neutron Spectra

SEARCH FOR BOUND η-NUCLEUS STATES

2009 ◽  
Vol 24 (02n03) ◽  
pp. 206-213 ◽  
Author(s):  
◽  
J. URBÁN ◽  
A. BUDZANOWSKI ◽  
A. CHATTERJEE ◽  
P. HAWRANEK ◽  
...  
Keyword(s):  
Cross Section ◽  
Opposite Direction ◽  
Wave Scattering ◽  
Scattering Amplitude ◽  
Scattering Length ◽  
Bound State ◽  
S Wave ◽  
Decay Products ◽  
Upper Limit ◽  
Zero Degree

The extracted s-wave scattering amplitude from both the polarized and unpolarized d + d → 4He + η reaction at 2385.5 MeV/c allowed to determine the scattering length which fulfills the requirements for bound η. In the p + 27Al → 3He + p + π- + X reaction studied at recoil free kinematics the η meson is produced almost at rest and so it can be bound with enhanced probability. This state proceeds via N*(1535) resonance and the decay products proton and pion emitted into opposite direction are detected in concidence with 3He produced at zero degree. Under these conditions some hints for bound state can be observed with an upper limit of the cross section of ≈ 0.5 nb.

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