Blurred images of complete fusion and incomplete fusion: Reaction simulation analysis of fission-fragment angular correlations

1986 ◽  
Vol 323 (1) ◽  
pp. 83-89 ◽  
Author(s):  
John M. Alexander ◽  
E. Duek ◽  
L. Kowalski
Keyword(s):  
Fission Fragment ◽  
Simulation Analysis ◽  
Fusion Reaction ◽  
Incomplete Fusion ◽  
Complete Fusion ◽  
Angular Correlations ◽  
Blurred Images

scholarly journals Influence of Incomplete Fusion Reaction on Complete Fusion Below 10 Mev/ Nucleon Energies

2015 ◽  
Vol 3 (1) ◽  
pp. 47-54
Author(s):  
Harish Kumar ◽  
◽  
Rahbar Ali ◽  
D. Singh ◽  
M.P.N. Naseef ◽  
...  
Keyword(s):  
Fusion Reaction ◽  
Incomplete Fusion ◽  
Complete Fusion

scholarly journals Hydroxyapatite/collagen composite graft for posterior lumbar interbody fusion: a comparison with local bone graft

2021 ◽  
Vol 16 (1) ◽  
Author(s):  
Toshitaka Yoshii ◽  
Motonori Hashimoto ◽  
Satoru Egawa ◽  
Takashi Hirai ◽  
Hiroyuki Inose ◽  
...  
Keyword(s):  
Bone Graft ◽  
Interbody Fusion ◽  
Pedicle Screws ◽  
Posterior Lumbar Interbody Fusion ◽  
Incomplete Fusion ◽  
Complete Fusion ◽  
Spinal Diseases ◽  
Titanium Cage ◽  
Local Bone ◽  
Autologous Bone

Abstract Background Autologous bone has been used for posterior lumbar intervertebral fusion (PLIF). However, harvesting autologous bone graft is associated with donor site complications. We previously developed a hydroxyapatite/collagen (HAp/Col) composite as an osteoconductive artificial bone, characterized by having a highly porous structure with sponge‐like elasticity. This study aims to investigate the effectiveness of HAp/Col composite with bone marrow aspirate (BMA) as a graft substitute in PLIF for the treatment of lumbar spinal diseases. Methods This study prospectively investigated patients who received one-level PLIF. For the interbody fusion, two titanium cages were inserted. On the one side of interbody space, HAp/Col composite incorporated with BMA filling the titanium cage was grafted. On the other side, local bone graft (LBG) harvested during decompressive laminotomy was grafted and then one-level instrumentation using pedicle screws was performed. The target levels were at L2/3 in 2 cases, L3/4 in 3 cases, L4/5 in 36 cases, and L5/S in 5 cases. We evaluated clinical symptoms and radiological outcomes of 46 patients and compared the fusion status of HAp/Col composite with that of LBG. Results The 1-year postoperative CT evaluation demonstrated that, in the HAp/Col, a complete fusion was observed in 38 patients (82.6%), whereas in the LBG, a complete fusion was observed in 35 patients (76.1%). There were no statistical differences between the HAp/Col and LBG. In the HAp/Col, incomplete fusion was observed in five patients (10.9%) and non-fusion in two patients (4.3%), and in the LBG, incomplete fusion was observed in nine patients (19.6%) and non-fusion in two patients (4.3%). At 2 years after the surgery, complete fusion increased to 44 patients (95.7%) in the HAp/Col and 41 patients (89.1%) in the LBG. There were no significant differences in the clinical scores for lumbar spine between patients with fusion and non-fusion. Conclusions The HAp/Col composite with BMA in the titanium cage can be effectively used as an alternative to conventional autologous LBG for intervertebral spinal fusion. Trial registration University hospital Medical Information Network, UMIN000045010, July 30th, 2021, Retrospectively registered, https://www.umin.ac.jp/english/.

Gamma-rays from an incomplete fusion reaction induced by 95 MeV 14N

1977 ◽  
Vol 68 (1) ◽  
pp. 51-54 ◽  
Author(s):  
T. Inamura ◽  
M. Ishihara ◽  
T. Fukuda ◽  
T. Shimoda ◽  
H. Hiruta
Keyword(s):  
Gamma Rays ◽  
Fusion Reaction ◽  
Incomplete Fusion

Projectile breakup effects in the fusion dynamics of 6,7Li +144,152Sm reactions around Coulomb barrier

2020 ◽  
Vol 29 (05) ◽  
pp. 2050029
Author(s):  
Manjeet Singh Gautam ◽  
Sukhvinder Duhan ◽  
Rishi Pal Chahal ◽  
Hitender Khatri ◽  
Suman B. Kuhar ◽  
...  
Keyword(s):  
Cross Section ◽  
Cross Sections ◽  
Coulomb Barrier ◽  
Incomplete Fusion ◽  
Complete Fusion ◽  
Cross Section Data ◽  
Suppression Factor ◽  
Model Calculations ◽  
Section Data ◽  
Breakup Channel

This work emphasized the role of the projectile breakup channel by studying the complete fusion (CF) and incomplete fusion (ICF) dynamics of [Formula: see text] reactions. The theoretical calculations for the chosen reactions have been done by opting for the coupled channel approach and the energy dependent Woods–Saxon potential (EDWSP) model. The below barrier fusion enhancements of the studied reactions are reasonably addressed by the outcomes of the adopted models, which in turn can be attributed to the couplings of nuclear structure degrees of freedom of the collision partners to their relative motion. In contrast, at above barrier energies, the CF cross-section data of the chosen reactions are found to be suppressed significantly when compared with the predictions made by using the present models. Interestingly, the fusion suppression factors of the given reactions can be minimized considerably with respect to the reported value when it is analyzed within the framework of the EDWSP model. For instance, in case of [Formula: see text] ([Formula: see text] reaction, the magnitude of fusion suppression factor is minimized up to 7% (13%) relative to the reported value whereas for [Formula: see text] ([Formula: see text] reaction, the fusion suppression factor is found to be less by 7% (8%) with reference to the reported value. Such suppression effects can be correlated with the low breakup threshold of alpha breakup channel associated with the loosely bound projectile. The projectiles being weakly bound systems split into two charged fragments and either of the breakup components is absorbed by the target resulting in the reduction of incoming flux going into fusion channel. The flux lost from the CF channel appears in the form of ICF yields. For [Formula: see text], total fusion (TF) cross-sections that are sum of CF and ICF cross-sections are also analyzed in conjunction with the EDWSP model and thus reasonably explained by the model calculations. In order to identify the ICF contribution, the ratio of ICF/TF cross-section data of [Formula: see text] reaction has been examined and thus properly addressed by using the EDWSP model. The presence of ICF component in TF cross-section clearly pointed out the breakup of projectile due to its loosely bound nature prior to the Coulomb barrier. Although ICF data of other systems are not available in the literature, a similar behavior is expected for ICF and TF data for [Formula: see text] and [Formula: see text] reactions.

scholarly journals Origins of Incomplete Fusion Products and the Suppression of Complete Fusion in Reactions of Li7

2019 ◽  
Vol 122 (10) ◽  
Author(s):  
K. J. Cook ◽  
E. C. Simpson ◽  
L. T. Bezzina ◽  
M. Dasgupta ◽  
D. J. Hinde ◽  
...  
Keyword(s):  
Incomplete Fusion ◽  
Complete Fusion ◽  
Fusion Products

scholarly journals Systematic measurements of prompt fission γ rays – and what they tell us about fission fragment de-excitation

2019 ◽  
Vol 211 ◽  
pp. 04001
Author(s):  
Andreas Oberstedt ◽  
Angélique Gatera ◽  
Alf Göök ◽  
Stephan Oberstedt
Keyword(s):  
Monte Carlo ◽  
Angular Distribution ◽  
Fission Fragment ◽  
Spontaneous Fission ◽  
Recent Measurement ◽  
Experimental Setup ◽  
Angular Correlations ◽  
Preliminary Results ◽  
Γ Rays ◽  
Prompt Fission

In a recent measurement of prompt γ rays from the spontaneous fission of 252Cf an experimental setup was chosen that allowed the study of angular correlations between γ rays and the nuclei from which they were emitted. The observed angular distribution of prompt fission γ rays was then analyzed to estimate the relative contributions from radiation of different multipolarity. Preliminary results are presented and compared to previous angular correlationmeasurements from different fission processes and recent results from calculations with the Monte Carlo Hauser-Feshbach code FIFRELIN.

Fission-Fragment Angular Correlations forU233,U235, andPu239(t, df)Reactions

1969 ◽  
Vol 181 (4) ◽  
pp. 1634-1639 ◽  
Author(s):  
H. C. Britt ◽  
J. D. Cramer
Keyword(s):  
Fission Fragment ◽  
Angular Correlations
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