collision broadening
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Author(s):  
Ahmed Al-Saudi ◽  
Abdulaziz Aljalal ◽  
Watheq Al-Basheer ◽  
Khaled Gasmi ◽  
Samer Qari

Author(s):  
V.V. Uchaikin ◽  
◽  
О.P. Harlova ◽  
I.I. Kozhemjakin ◽  
◽  
...  

2015 ◽  
Author(s):  
V. V. Gerasimov ◽  
V. V. Zuev ◽  
V. L. Pravdin ◽  
D. P. Nakhtigalova ◽  
A. V. Pavlinskiy

Author(s):  
Hubert Cybulski ◽  
Andrzej Bielski ◽  
Roman Ciuryło ◽  
Józef Szudy ◽  
Ryszard S. Trawiński

2011 ◽  
Vol 26 (03n04) ◽  
pp. 699-701
Author(s):  
◽  
A. PRICKING ◽  
H. CLEMENT

The double-pionic fusion reactions dd → 4 He π0π0 and dd → 4 He π+π- were measured exclusively and kinematically complete with the WASA detector at COSY. The measurements were performed in the energy range Tp = 0.8 - 1.4 GeV covering thus the full energy region, where the so-called ABC effect – a peculiar low-mass enhancement in the ππ-invariant mass spectrum – was observed previously in inclusive measurements. Our findings for the double-pionic fusion to 4 He are in accordance with the observations for the basic pn → dπ0π0 reaction pointing to the same fundamental mechanism. In both cases we observe that the ABC effect is associated with a peak in the energy dependence of the total cross section. In the 4 He case the peak structure in the total cross section is broadened in comparison to the deuteron case. This is consistent with both Fermi motion of the basic pn system within 4 He and with collision broadening as it is known, e.g., from excitations of the Δ resonance in nuclei.


Author(s):  
Can T. Xu ◽  
Marta Lewander ◽  
Tomas Svensson ◽  
Stefan Andersson-Engels ◽  
Sune Svanberg

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