Lembit Sihver

2022

Broadening the selection criteria for Astronauts undertaking long–term space travel

Monte Carlo simulation of semiconductor-based detector in mixed radiation field in the atmosphere

α-decay half-lives new semi-empirical relationship including asymmetry, angular momentum and shell effects

Space Dosimetry and Space Phantom Experiments

Space Radiation Risk Reduction through Prediction, Detection and Protection

Risk of severe COVID-19 infection in International Space Station astronauts despite routine pre-mission measures

An analytical description of the parity-doublet structure in an odd-A nucleus

2021

Requirements for designing an effective metallic nanoparticle (NP)-boosted radiation therapy (RT)

2021

Biological protection in deep space missions

Can Reactivation of SARS-CoV-2 Decrease the Chance of Success of Future Deep Space Missions?

2021

Total nuclear reaction cross-section database for radiation protection in space and heavy-ion therapy applications

Radioadaptation of Astronauts' Microbiome and Bodies in a Deep Space Mission to Mars and Beyond

Does Exposure of Astronauts' Brains to High-LET Radiation in Deep Space Threaten the Success of the Mission?

Can Adaptive Response and Evolution Make Survival of Extremophile Bacteria Possible on Mars?

New empirical formula for calculating (n, p) reaction cross-sections at 14.5 MeV neutrons

2020

Are Further Cross Section Measurements Necessary for Space Radiation Protection or Ion Therapy Applications? Helium Projectiles

Radiation environment onboard spacecraft at LEO and in deep space

CONTRIBUTION OF INDIRECT EFFECTS TO CLUSTERED DAMAGE IN DNA IRRADIATED WITH PROTONS

Improvements and developments of physics models in PHITS for space applications

Overview of particle and heavy ion transport code system PHITS

PHITS simulations of absorbed dose out-of-field and neutron energy spectra for ELEKTA SL25 medical linear accelerator

Radiation Environment at Aviation Altitudes and in Space

On the use of CR-39 PNTD with AFM analysis in measuring proton-induced target fragmentation particles

Overview of Particle and Heavy Ion Transport Code System PHITS

Method for the prediction of the effective dose equivalent to the crew of the International Space Station

Measurement of target fragments produced by 160 MeV proton beam in aluminum and polyethylene with CR-39 plastic nuclear track detectors

Voxel model of individual cells and its implementation in microdosimetric calculations using GEANT4

Current status of the "Hybrid Kurotama model" for total reaction cross sections

2014

Poster session 11: Space dosimetry and environment dosimetry measurements using timepix in mixed radiation fields induced by heavy ions; comparison with standard dosimetry methods

2014

Improved parametrization of the transparency parameter in Kox and Shen models of total reaction cross sections

Clustered DNA damage on subcellular level: effect of scavengers

Qualification of helium measurement system for detection of fuel failures in a BWR

Depth dependency of neutron density produced by cosmic rays in the lunar subsurface

Dose Distribution Outside the Target Volume for 170-Mev Proton Beam

Projectile fragment emission angles in fragmentation reactions of light heavy ions in the energy region < 200 MeV/nucleon: Experimental study

PHITS simulations of the Protective curtain experiment onboard the Service module of ISS: Comparison with absorbed doses measured with TLDs

Comparison of PHITS, GEANT4, and HIBRAC simulations of depth-dependent yields of beta(+)-emitting nuclei during therapeutic particle irradiation to measured data

Anthology of the Development of Radiation Transport Tools as Applied to Single Event Effects

2013

PHITS - Applications to radiation biology and radiotherapy

On-line monitoring of control rod integrity in BWRs using a mass spectrometer

Dosimetry by means of in-beam PET with RI beam irradiation

ISSCREM: International Space Station cosmic radiation exposure model

Particle and Heavy Ion Transport code System, PHITS, version 2.52

A comparison of total reaction cross section models used in FLUKA, GEANT4 and PHITS

Improvements of fuel failure detection in boiling water reactors using helium measurements

Applications of the microdosimetric function implemented in the macroscopic particle transport simulation code PHITS

A comparison of total reaction cross section models used in particle and heavy ion transport codes

Applications of the microdosimetric function implemented in the macroscopic particle transport simulation code PHITS

Simulations of absorbed dose on the phantom surface of MATROSHKA-R experiment at the ISS

Factors influencing helium measurements for detection of control rod failures in BWR

Simulations of MATROSHKA experiment outside the ISS using PHITS

Applicability of the PHITS Code to Heavy Ion Accelerator Facilities

Dose estimation for astronauts using dose conversion coefficients calculated with the PHITS code and the ICRP/ICRU adult reference computational phantoms

A study of total reaction cross section models used in particle and heavy ion transport codes

Therapeutic techniques applied in the heavy-ion therapy at IMP

Evaluation of dose rate reduction in a spacecraft compartment due to additional water shield

Neutron production in the lunar subsurface from alpha particles in galactic cosmic rays

Monte Carlo simulations of MATROSHKA experiment outside ISS

Approach to 3D dose verification by utilizing autoactivation

Event Generator Models in the Particle and Heavy Ion Transport Code System; PHITS

Production of a fluorescence probe in ion-beam radiolysis of aqueous coumarin-3-carboxylic acid solution-2: Effects of nuclear fragmentation and its simulation with PHITS

Charge resolution of CR-39 plastic nuclear track detectors for intermediate energy heavy ions

Study of high-LET radiation-produced radical/ROS species and indirect strand break induction in naked dsDNA (22B493)

Improvement of charge resolution for trans-iron nuclei (Z≥30) in CR-39 plastic nuclear track detectors using trajectory tracing technique

Transport calculations and accelerator experiments needed for radiation risk assessment in space

PHITS simulations of the Matroshka experiment

Nuclear fragmentation database for GCR transport code development

Simulations of MATROSHKA experiments at ISS using PHITS

Simulations of the MATROSHKA experiment at the international space station using PHITS

An update about recent developments of the PHITS code

Lunar radiation dose due to cosmic rays and their secondary particles

A comparison of total reaction cross section models used in particle and heavy ion transport codes

Fragmentation of 370 MeV/n Ne-20 and 470 MeV/n Mg-24 in light targets

HIBRAC:a 1-D Deterministic Heavy-Ion Transport Code Optimised for Radiotherapy

Present status and validation of HIBRAC

Biological Dose Estimation for Charged-Particle Therapy using an Improved PHITS Code Coupled with a Microdosimetric Kinetic Model

Neutron Production in the Lunar Subsurface from Galactic Cosmic Rays

Stability of Nuclei in Peripheral Collisions in the JAERI Quantum Molecular Dynamics Model

Simulations of th MTR-R and MTR Experiments at ISS, and Shielding Properties using PHITS

Calculation of Energy-Deposition Distributions and Microdosimetric Estimation of the Biological Effect of a 9C Beam

The Ground Level Event 70 on December 13th, 2006 and Related Effective Doses at Aviation Altitudes

Simulations of the Radiation Environment at ISS Altitudes

Temporal and spatial evolution of the solar energetic particle event on 20 January 2005 and resulting radiation doses in aviation

Physics and Biophysics Experiments Needed for Improved Risk Assessment in Space

Monte-Carlo calculations of particle fluxes and effective neutron dose rates in the atmosphere

Development of PARMA: PHITS based Analytical Radiation Model in the Atmosphere

Measurements of projectile-like Be-8 and B-9 production in 200-400 MeV/nucleon C-12 on water

Comparison of fragmentation spectra using 1 GeV/amu 56 Fe data and the PHITS model

Improved dose and fluence calculations by using tabulated cross sections in PHITS

Shielding Design of Spacecrafts Using PHITS,

PARMA: PHITS-based analytical radiation model in the atmosphere - Verification of its accuracy in estimating cosmic radiation doses

Dose calculations at high altitudes and in deep space with Geant4 using BIC and JQMD models for nucleus-nucleus reactions

Bench marking of calculated projectile fragmentation cross sections using the 3-D, MC codes PHITS, FLUKA, HETC-HEDS, MCNPX_HI, and NUCFRG2

Transport calculations and accelerator experiments needed for radiation risk assessment in space

Fragmentation Cross Sections of Medium-Energy 35Cl, 40Ar, and 48Ti Beams on Elemental Targets

Measurements of total and partial charge-changing cross sections for 200-to 400-MeV/nucleon C-12 on water and polycarbonate

Weak and strong factorization properties in nucleus-nucleus collisions in the energy region 290–2100 MeV/n

The altcriss project on board the International Space Station

Recent developments and benchmarking of the PHITS code

Comparison of aluminum and lucite for shielding against 1 GeV protons

Performance test of CR-39 plastic nuclear track detectors for therapeutic carbon beam dosimetry

Test of weak and strong factorization in nucleus-nucleus collisions at several hundred MeV/nucleon

PHITS - benchmark of partial charge-changing cross sections for intermediate-mass systems

Shielding of relativistic protons

Reactions between reactive metals and iodine in aqueous solutions

PHITS - a particle and heavy ion transport code system

Applicability of particle and heavy ion transport code PHITS to the shielding design of spacecrafts

HIBRAC: a 1-D deterministic heavy-ion transport code optimised for radiotherapy

High Pressure Hydriding of Zircaloy Cladding by the Thermogravimetry and Tube-Burst Technique

Simulations of an Accelerator-Based Shielding Experiment Using the Particle and Heavy-Ion Transport code System PHITS

Fragmentation of 1 GeV/nucleon iron ions in thick targets relevant for space exploration

Projectile-like fragment emission angels in fragmentation reactions of light heavy ions in the energy region < 200 MeV/u: I Modeling and simulations

The measurement of the fragment emission angles in the reactions of < 135 MeV/u12C and 16O in tissue equivalent targets

Fragmentation of 200 and 244 MeV/u Carbon Beams in Thick Tissue-Like Absorbers

Depth-Dose Distributions of High-Energy Carbon, Oxygen and Neon Beams in Water

Transport of Light Ions in Matter

Calculations of Depth-Dose Distributions, Cross Sections and Momentum Loss

Nuclear Fragmentation of High-Energy Heavy-Ion Beams in Water

Energy Degradation in Cosmic-Ray Nuclear Spallation Reactions: Relaxing the Straight-Ahead Approximation

Delayed-Neutron Branching Ratios of Precursors in the Fission Product Region

Total Reaction and Partial Cross Section Calculations in Proton-Nucleus (Zt < 26) and Nucleus-Nucleus Reactions (Zp and Zt < 26)

Scaling Algorithm to Calculate Heavy-Ion Spallation Cross Sections

High-Energy Nucleus-Nucleus Interactions

Gold Target Fragmentation by 800 GeV protons

Changes in Target Fragmentation Mechanisms with Increasing Projectile Energy in Intermediate Energy Nuclear Collisions

Heavy Residue Linear Momenta in Intermediate Energy Krypton-Gold Collisions

Decays of 134Sn and 134Sb

Heavy Residue Spectra in the Interaction of 85 A MeV 12C with 197Au

Nonequilibrium Fission and Heavy Residue Production in the Interaction of 12-16 MeV/Nucleon 32S with 165Ho

Unusual Backward Emission of Multifragmentation Products in Ultrarelativistic Nucleus-Nucleus Collisions

Production of Intermediate Mass Fragments in Ultrarelativistic Nuclear Collisions

Target Fragmentation in Ultrarelativistic Nuclear Collisions

Formation of Large Target Residues in Intermediate Energy Nuclear Collisions

Formation of Large Target Residues in Intermediate Energy Nuclear Collisions