Using the 27 KG magnetic field produced by a superconducting solenoid we have searched for trapped magnetic monopoles in a magnetite sample from North China.We have scanned the nuclear emulsion both for low ionizing t...Using the 27 KG magnetic field produced by a superconducting solenoid we have searched for trapped magnetic monopoles in a magnetite sample from North China.We have scanned the nuclear emulsion both for low ionizing tracks and heavily ionizing tracks,and the plastic film for heavily ionizing tracks of magnetic monopoles.We obtain a 90%confidence level upper limit of 1.8×10^(-26) monopoles per nucleon in the magnetite sample.展开更多
Based on the proposal by Witten,De Rujula and Glashow,we carried out the experimental search on two meteorites for the fossil tracks formed by cosmic nuclearites with masses ranging from M~6×10^(-4)g up to very l...Based on the proposal by Witten,De Rujula and Glashow,we carried out the experimental search on two meteorites for the fossil tracks formed by cosmic nuclearites with masses ranging from M~6×10^(-4)g up to very large mass.An upper limit 2km-2y-1(2πsr)-1 was obtained for the cosmic nuclearites with masses larger than 6×10^(-4)g which passed through these meteorites.展开更多
文摘Using the 27 KG magnetic field produced by a superconducting solenoid we have searched for trapped magnetic monopoles in a magnetite sample from North China.We have scanned the nuclear emulsion both for low ionizing tracks and heavily ionizing tracks,and the plastic film for heavily ionizing tracks of magnetic monopoles.We obtain a 90%confidence level upper limit of 1.8×10^(-26) monopoles per nucleon in the magnetite sample.
文摘Based on the proposal by Witten,De Rujula and Glashow,we carried out the experimental search on two meteorites for the fossil tracks formed by cosmic nuclearites with masses ranging from M~6×10^(-4)g up to very large mass.An upper limit 2km-2y-1(2πsr)-1 was obtained for the cosmic nuclearites with masses larger than 6×10^(-4)g which passed through these meteorites.
