BACKGROUND Insomnia is a common sleep disorder that negatively impacts quality of life and is frequently comorbid with depression and anxiety.Chronic insomnia affects approximately 15%of the global population,with hig...BACKGROUND Insomnia is a common sleep disorder that negatively impacts quality of life and is frequently comorbid with depression and anxiety.Chronic insomnia affects approximately 15%of the global population,with higher prevalence among females and the elderly.While existing research suggests a bidirectional relationship between insomnia and emotional disorders,the specific impact of insomnia severity on depression,anxiety,and quality of life remains unclear.This study investigates the correlation between insomnia severity and these factors in psychiatric outpatients,hypothesizing that greater insomnia severity is associated with higher levels of depression and anxiety,as well as poorer quality of life.AIM To explore the correlation between insomnia severity and depression,anxiety,and quality of life in primary chronic insomnia patients.METHODS From June to December 2023,345 patients with primary insomnia in Chifeng city were recruited and divided into three groups based on Pittsburgh sleep quality index(PSQI)scores:Mild(n=137),moderate(n=162),and severe(n=46).Demographic data were collected via questionnaires.Self-rating depression scale(SDS),self-rating anxiety scale(SAS),PSQI,and short form 36(SF-36)scores were compared,and Pearson and partial correlation analyses were performed.RESULTS The greater the degree of insomnia,the greater the symptoms of depression and anxiety(P<0.001).The more severe the insomnia,the lower the SF-36 score(excluding body pain),and the difference between the three groups was statist ically significant(P<0.001).Pearson correlation analysis and partial correlation analysis depicted the SDS score and SAS score were apparently positively correlated with the severity of insomnia(P<0.001).Pearson correlation analysis and partial correlation analysis depicted the SF-36 scores were apparently positively correlated with the severity of insomnia(P<0.05).CONCLUSION Depression and anxiety are independent factors influencing insomnia severity in primary chronic insomnia patients.Higher depression/anxiety levels correlate with worse insomnia,impacting quality of life.展开更多
Shell evolution is crucial for understanding nuclear structures across the nuclear chart.In this work,we employed the ab initio valence space in-medium similarity renormalization group with chiral nucleon-nucleon and ...Shell evolution is crucial for understanding nuclear structures across the nuclear chart.In this work,we employed the ab initio valence space in-medium similarity renormalization group with chiral nucleon-nucleon and three-nucleon interactions to study neutron-rich Si,S,Ar,and Ca isotopes,particularly focusing on nuclei near N=32,34.We systematically analyzed both neutron and proton shell evolutions by examining the excitation energies of the first 2^(+)states and the effective single-particle energies.Our calculations show that the N=32 sub-shell gradually weakens as protons are removed from the doubly magic nucleus^(52)Ca,eventually disappearing in 46si.Conversely,the strength of the N=34 sub-shell is enhanced with the removal of protons from^(54)Ca.Furthermore,our results indicate the existence of the proton Z=14 sub-shell in neutron-rich Si isotopes.These findings suggest that^(48)Si is a doubly magic nucleus,with the excitation energy of the first 2^(+)state around 2.49 MeV,which is approximately 400 keV higher than that of^(54)Ca.This value is comparable to those of other well-known exotic doubly magic nuclei,such as^(52)Ca and^(78)Ni,which is of great interest for further experiments at RIB facilities.In addition,we predicted the low-lying spectra of neutron-rich Si,S,and Ar isotopes,providing new insights for future experiments.展开更多
Neutron-rich boron,carbon,and nitrogen isotopes have garnered extensive experimental and theoretical interest.In the present work,we conducted a comprehensive study of these nuclei by utilizing ab initio valence-space...Neutron-rich boron,carbon,and nitrogen isotopes have garnered extensive experimental and theoretical interest.In the present work,we conducted a comprehensive study of these nuclei by utilizing ab initio valence-space in-medium similarity renormalization group calculations with chiral nucleon-nucleon and three-nucleon interactions.First,we systematically calculated the spectra of nuclei.Our results align well with the available experimental data,which are comparable to phenomenological shell model calculations.Subsequently,the evolution of the N=14 and N=16 shell gaps is discussed based on the calculated spectra and the effective single-particle energies.Our calculations suggest that the N=14 neutron subshell is present in the oxygen isotopes but disappears in the boron,carbon,and nitrogen isotopic chains.Moreover,the N=16 subshell is present in all isotopes but gradually decreases from^(24)O to^(21)B.These results provide valuable information for future studies.展开更多
Mirror energy difference is a key observable in isospin symmetry breaking,containing rich information about nuclear structure.Understanding the mechanisms underlying mirror energy difference is important in nuclear ph...Mirror energy difference is a key observable in isospin symmetry breaking,containing rich information about nuclear structure.Understanding the mechanisms underlying mirror energy difference is important in nuclear physics.In the present work,we extensively investigated mirror energy difference using ab initio valence-space inmedium similarity renormalization group approach,focusing specifically on sd-shell nuclei.The low-lying spectra of Al isotopes and N=8 isotones,together with their mirror nuclei,were calculated,followed by a systematic analysis of the evolution of the mirror energy difference.The results suggest that the large mirror energy difference is mainly caused by the weakly-bound effects and large average occupations of the 1s1/2 orbit.Lastly,we compare the results of our ab initio calculations with shell model results,elucidating the relationship and coherence between these two models.展开更多
文摘BACKGROUND Insomnia is a common sleep disorder that negatively impacts quality of life and is frequently comorbid with depression and anxiety.Chronic insomnia affects approximately 15%of the global population,with higher prevalence among females and the elderly.While existing research suggests a bidirectional relationship between insomnia and emotional disorders,the specific impact of insomnia severity on depression,anxiety,and quality of life remains unclear.This study investigates the correlation between insomnia severity and these factors in psychiatric outpatients,hypothesizing that greater insomnia severity is associated with higher levels of depression and anxiety,as well as poorer quality of life.AIM To explore the correlation between insomnia severity and depression,anxiety,and quality of life in primary chronic insomnia patients.METHODS From June to December 2023,345 patients with primary insomnia in Chifeng city were recruited and divided into three groups based on Pittsburgh sleep quality index(PSQI)scores:Mild(n=137),moderate(n=162),and severe(n=46).Demographic data were collected via questionnaires.Self-rating depression scale(SDS),self-rating anxiety scale(SAS),PSQI,and short form 36(SF-36)scores were compared,and Pearson and partial correlation analyses were performed.RESULTS The greater the degree of insomnia,the greater the symptoms of depression and anxiety(P<0.001).The more severe the insomnia,the lower the SF-36 score(excluding body pain),and the difference between the three groups was statist ically significant(P<0.001).Pearson correlation analysis and partial correlation analysis depicted the SDS score and SAS score were apparently positively correlated with the severity of insomnia(P<0.001).Pearson correlation analysis and partial correlation analysis depicted the SF-36 scores were apparently positively correlated with the severity of insomnia(P<0.05).CONCLUSION Depression and anxiety are independent factors influencing insomnia severity in primary chronic insomnia patients.Higher depression/anxiety levels correlate with worse insomnia,impacting quality of life.
基金Supported by the National Key R&D Program of China(2024YFE0109800,2024YFE0109802,2023YFA1606403)the National Natural Science Foundation of China(12405141,12205340,12175281,12347106,12475128,12322507,12121005)+2 种基金the Youth Innovation Promotion Association of the Chinese Academy of Sciences(2022423)the Gansu Natural Science Foundation(22JR5RA123,23JRRA614)the Natural Science Foundation of Henan Province(242300421048).
文摘Shell evolution is crucial for understanding nuclear structures across the nuclear chart.In this work,we employed the ab initio valence space in-medium similarity renormalization group with chiral nucleon-nucleon and three-nucleon interactions to study neutron-rich Si,S,Ar,and Ca isotopes,particularly focusing on nuclei near N=32,34.We systematically analyzed both neutron and proton shell evolutions by examining the excitation energies of the first 2^(+)states and the effective single-particle energies.Our calculations show that the N=32 sub-shell gradually weakens as protons are removed from the doubly magic nucleus^(52)Ca,eventually disappearing in 46si.Conversely,the strength of the N=34 sub-shell is enhanced with the removal of protons from^(54)Ca.Furthermore,our results indicate the existence of the proton Z=14 sub-shell in neutron-rich Si isotopes.These findings suggest that^(48)Si is a doubly magic nucleus,with the excitation energy of the first 2^(+)state around 2.49 MeV,which is approximately 400 keV higher than that of^(54)Ca.This value is comparable to those of other well-known exotic doubly magic nuclei,such as^(52)Ca and^(78)Ni,which is of great interest for further experiments at RIB facilities.In addition,we predicted the low-lying spectra of neutron-rich Si,S,and Ar isotopes,providing new insights for future experiments.
基金supported by the National Key R&D Program of China(Nos.2024YFE0109800 and 2024YFE0109802)the National Natural Science Foundation of China(Nos.12405141,12347106,12205340,and 12121005)+1 种基金the Gansu Natural Science Foundation(No.25JRRA467)the Key Research Program of the Chinese Academy of Sciences(No.XDPB15)。
文摘Neutron-rich boron,carbon,and nitrogen isotopes have garnered extensive experimental and theoretical interest.In the present work,we conducted a comprehensive study of these nuclei by utilizing ab initio valence-space in-medium similarity renormalization group calculations with chiral nucleon-nucleon and three-nucleon interactions.First,we systematically calculated the spectra of nuclei.Our results align well with the available experimental data,which are comparable to phenomenological shell model calculations.Subsequently,the evolution of the N=14 and N=16 shell gaps is discussed based on the calculated spectra and the effective single-particle energies.Our calculations suggest that the N=14 neutron subshell is present in the oxygen isotopes but disappears in the boron,carbon,and nitrogen isotopic chains.Moreover,the N=16 subshell is present in all isotopes but gradually decreases from^(24)O to^(21)B.These results provide valuable information for future studies.
基金the National Natural Science Foundation of China(12205340,11975282)the Gansu Natural Science Foundation(22JR5RA123)+3 种基金the Special Research Assistant Project of the Chinese Academy of Sciencesthe Strategic Priority Research Program of Chinese Academy of Sciences(XDB34000000)the Key Research Program of the Chinese Academy of Sciences(XDPB15)the State Key Laboratory of Nuclear Physics and Technology,Peking University(NPT2020KFY13)。
文摘Mirror energy difference is a key observable in isospin symmetry breaking,containing rich information about nuclear structure.Understanding the mechanisms underlying mirror energy difference is important in nuclear physics.In the present work,we extensively investigated mirror energy difference using ab initio valence-space inmedium similarity renormalization group approach,focusing specifically on sd-shell nuclei.The low-lying spectra of Al isotopes and N=8 isotones,together with their mirror nuclei,were calculated,followed by a systematic analysis of the evolution of the mirror energy difference.The results suggest that the large mirror energy difference is mainly caused by the weakly-bound effects and large average occupations of the 1s1/2 orbit.Lastly,we compare the results of our ab initio calculations with shell model results,elucidating the relationship and coherence between these two models.
