Papers by SWARUP RANJAN Sahoo
Natural Hazards, 2011
This paper reports the measurement of radon concentration in well water at the site of Jalpaiguri... more This paper reports the measurement of radon concentration in well water at the site of Jalpaiguri (26°32′N, 88°46′E) near the active fault zone of West Bengal, India. Radon concentration has been measured in well water with the help of solid-state nuclear track detectors (SSNTD). The study indicates a positive correlation between radon anomaly and earthquake. The data of radon content in well water have been compared with that in soil gas at the same site.
Europhysics Letters (epl), 2001
... produced in ultra-relativistic nuclear collisions D. Ghosh, A. Deb, S. Ranjan Sahoo and P. Ku... more ... produced in ultra-relativistic nuclear collisions D. Ghosh, A. Deb, S. Ranjan Sahoo and P. KumarHaldar High Energy Physics Division, Department of Physics Jadavpur University - Calcutta, 700032, India (received 16 March 2001; accepted in final form 10 September 2001) ...
Nuclear Physics A, 2002
We analyze the experimental data on the charge pion multiplicity distribution in 16 O-AgBr intera... more We analyze the experimental data on the charge pion multiplicity distribution in 16 O-AgBr interaction at 60 A GeV in terms of multifractals. From the knowledge of generalized dimension D q , multifractal specific heats are calculated from G-moment and F -moment analysis and compared with other nucleus-nucleus interactions data at comparatively low energy. It has been observed that the constant specific heat approximation suggested for hadronic collision fails in nucleus-nucleus interactions. 2002 Published by Elsevier Science B.V. PACS: 25.75.-q; 24.60.Ky * Corresponding author. E-mail address: dg@jufs.ernet.in (D. Ghosh). 0375-9474/02/$ -see front matter 2002 Published by Elsevier Science B.V. PII: S 0 3 7 5 -9 4 7 4 ( 0 2 ) 0 0 7 5 4 -6
Europhysics Letters (epl), 2001
An analysis of data of pions emitted from ultra-relativistic nuclear interactions initiated by 16... more An analysis of data of pions emitted from ultra-relativistic nuclear interactions initiated by 16O - AgBr at 60 GeV/nucleon and 32S - AgBr at 200 GeV/nucleon reveals the existence of emission asymmetry in the azimuthal plane which is found to depend on the number of pions but to be nearly independent of projectile mass and energy.
Europhysics Letters (epl), 2004
The fractal behaviour of medium-energy knocked-out protons in angular and azimuthal phase space f... more The fractal behaviour of medium-energy knocked-out protons in angular and azimuthal phase space for 28Si-AgBr interactions at 14.5 A GeV has been studied using Takagi's method. The generalized dimensions (Dq) are determined from this method. The data reflects the monofractal behaviour of medium-energy knocked-out protons.
Modern Physics Letters A, 2003
In this paper the study of gap probability of protons has been carried out with 28Si AgBr interac... more In this paper the study of gap probability of protons has been carried out with 28Si AgBr interaction at 14.5 A GeV in emission angle space. The study reveals the scaling behaviour of the void probability which hints towards the outer space inner space connection. This study also confirms the validity of the linked pair approximation for the N-particle cumulant correlation functions in case of protons.
Nuclear Physics A, 2002
We analyze the experimental data on the charge pion multiplicity distribution in 16O-AgBr interac... more We analyze the experimental data on the charge pion multiplicity distribution in 16O-AgBr interaction at 60 A GeV in terms of multifractals. From the knowledge of generalized dimension Dq, multifractal specific heats are calculated from G-moment and F-moment analysis and compared with other nucleus-nucleus interactions data at comparatively low energy. It has been observed that the constant specific heat approximation suggested for hadronic collision fails in nucleus-nucleus interactions.
Radiation Measurements, 2011
Study of radon behaviour in soil or groundwater provides important information in case of seismic... more Study of radon behaviour in soil or groundwater provides important information in case of seismic activity within the earth's crust. In a previous work, we have tried to correlate the occurrence of radon concentration anomalies in soil with incidents of earthquakes within the distance of 1000 km from the experimental site. The experiment was performed at Kolkata, West Bengal, India (22.53 N, 88.4 E) which is not located in an active fault zone. In extension of our study we have performed simultaneous measurement of radon in an active fault zone at Jalpaiguri (26.53 N, 88.76 E), West Bengal, India as well as in Kolkata e a non-active fault zone. The variation of radon concentration in soil gas was measured by SSNTDs [Solid State Nuclear Track-etch Detector(s)]. Interesting features of an anomalous fluctuation in radon concentration in both the seismic as well as non-seismic zones prior to any particular earthquake is reported.
Chinese Physics Letters, 2002
Europhysics Letters (epl), 2004
This work studies the validity of the negative binomial distribution in the multiplicity distribu... more This work studies the validity of the negative binomial distribution in the multiplicity distribution of charged secondaries in 16O and 32S interactions with AgBr at 60 GeV/c per nucleon and 200 GeV/c per nucleon, respectively. The validity of negative binomial distribution (NBD) is studied in different azimuthal phase spaces. It is observed that the data can be well parameterized in terms of the NBD law for different azimuthal phase spaces.
Czechoslovak Journal of Physics, 2002
An analysis of data of target fragments of 28Si-AgBr (at 14.5 AGeV) reveals the existence of emis... more An analysis of data of target fragments of 28Si-AgBr (at 14.5 AGeV) reveals the existence of emission asymmetry in the azimuthal plane, which is found to depend on the number of target fragments. The comparison with the data of 32S-AgBr (at 200 AGeV) and 16O-AgBr (at 60 AGeV) interactions indicates that emission asymmetry depends on the projectile mass and energy.
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Papers by SWARUP RANJAN Sahoo