Lifetimes of the 2_(1)^(+),4_(1)^(+),7_(2)^(-),10_(2)^(+),12_(2)^(+),and 14_(1)^(+) states in 138 Nd populated via the 123 Sb(19 F,4n)138 Nd fusion–evaporation reaction were measured with the recoil distance Doppler ...Lifetimes of the 2_(1)^(+),4_(1)^(+),7_(2)^(-),10_(2)^(+),12_(2)^(+),and 14_(1)^(+) states in 138 Nd populated via the 123 Sb(19 F,4n)138 Nd fusion–evaporation reaction were measured with the recoil distance Doppler shift technique in combination with the differential decay curve method.The B(E2;2_(1)^(+)→0_(1)^(+))value fit well with the systematic trend in the Nd isotope chain and Grodzins rule,which proved that 138Nd is a transitional nucleus.展开更多
To the Editor： Valve stenosis and regurgitation can lead to a series of symptoms, including chest distress and dyspnea. Valve replacement is an effective surgical procedure that improves patients＇ quality of life an...To the Editor： Valve stenosis and regurgitation can lead to a series of symptoms, including chest distress and dyspnea. Valve replacement is an effective surgical procedure that improves patients＇ quality of life and life span and has played an increasingly important role in treating mitral valve diseases. Previous studies have reported different risk factors and independent predictors of increased mortality in patients with mitral valve replacement （MVR） and/or aortic valve replacement （AVR）. This study retrospectively reviewed data on patients undergoing valve surgery to determine the risk factors and predictors of short-term mortality in this patient population.展开更多
When accidental bleeding happens on the posterior wall of vena cava during the procedure of vena cava cannulation [Figure l a], two pieces of thymus gland tissue around 2 cm × 1 cm were taken as the mattress tips...When accidental bleeding happens on the posterior wall of vena cava during the procedure of vena cava cannulation [Figure l a], two pieces of thymus gland tissue around 2 cm × 1 cm were taken as the mattress tips, and these two pieces of tissue were put aside the bottom of vena cava, then use Prolene （Ethicon, Somerville, N J, USA） to pass through the interspace under the posterior wall to make a mattress suture [Figure 1 b and c]. Knot is tied with adequate tension to eliminate any obvious bleeding and to achieve complete hemostasis [Figure l d]. In some cases, additional mattress sutures are needed to stop bleeding.展开更多
Excited states in the odd-A nucleus 71Ga have been studied via the ^(70)Zn(7Li,a2n)^(71)Ga fusion-evaporation reaction with incident beam energies of 30 and 35 MeV.The level scheme is established up to spin I^(n)=(29/...Excited states in the odd-A nucleus 71Ga have been studied via the ^(70)Zn(7Li,a2n)^(71)Ga fusion-evaporation reaction with incident beam energies of 30 and 35 MeV.The level scheme is established up to spin I^(n)=(29/2^(+))and an excitation energy-6.6 MeV.A previously known sequence built on the 9/2^(+) state is extended as a novel rotational band originating from the v(8^(2)_(9/2)alignment.Furthermore,a negative-parity sequence Is also reported.The observed energy levels of Ga have been interpreted in the framework of the nuclear shell model(SM).展开更多
The lifetime of the 2^+1 state in ^106Cd populated via the ^94Zr(^16O,4n)^106Cd reaction has been measured with the Recoil Distance Doppler Shift technique in combination with the Differential Decay Curve Method.By su...The lifetime of the 2^+1 state in ^106Cd populated via the ^94Zr(^16O,4n)^106Cd reaction has been measured with the Recoil Distance Doppler Shift technique in combination with the Differential Decay Curve Method.By subtracting the contamination in the data,the mean lifetime of the I^π=2^+1633 keV state was determined as 9.9(12)ps.The B(E2)value calculated in this study is in good agreement with the experimental systematics and was compared to the shell model calculations.展开更多
基金This work was supported by the National Natural Science Foundation of China(Nos.U1932209,11975315,U1867210,and 11905134)the Leading Innovation Project(Nos.LC192209000701 and LC202309000201)+1 种基金the Continuous Basic Scientific Research Project(Nos.BJ20002501 and WDJC-2019-13)the China National Nuclear Corporation(No.FA18000201).
文摘Lifetimes of the 2_(1)^(+),4_(1)^(+),7_(2)^(-),10_(2)^(+),12_(2)^(+),and 14_(1)^(+) states in 138 Nd populated via the 123 Sb(19 F,4n)138 Nd fusion–evaporation reaction were measured with the recoil distance Doppler shift technique in combination with the differential decay curve method.The B(E2;2_(1)^(+)→0_(1)^(+))value fit well with the systematic trend in the Nd isotope chain and Grodzins rule,which proved that 138Nd is a transitional nucleus.
文摘To the Editor： Valve stenosis and regurgitation can lead to a series of symptoms, including chest distress and dyspnea. Valve replacement is an effective surgical procedure that improves patients＇ quality of life and life span and has played an increasingly important role in treating mitral valve diseases. Previous studies have reported different risk factors and independent predictors of increased mortality in patients with mitral valve replacement （MVR） and/or aortic valve replacement （AVR）. This study retrospectively reviewed data on patients undergoing valve surgery to determine the risk factors and predictors of short-term mortality in this patient population.
文摘When accidental bleeding happens on the posterior wall of vena cava during the procedure of vena cava cannulation [Figure l a], two pieces of thymus gland tissue around 2 cm × 1 cm were taken as the mattress tips, and these two pieces of tissue were put aside the bottom of vena cava, then use Prolene （Ethicon, Somerville, N J, USA） to pass through the interspace under the posterior wall to make a mattress suture [Figure 1 b and c]. Knot is tied with adequate tension to eliminate any obvious bleeding and to achieve complete hemostasis [Figure l d]. In some cases, additional mattress sutures are needed to stop bleeding.
基金Supported by the National Natural Science Foundation of China(U1932209,11975315,U1867210,11905134)the Leading Innovation Project under Grant(LC192209000701,LC202309000201)+1 种基金the Continuous Basic Scientific Research Project(BJ20002501,WDJC-2019-13)China National Nuclear Corporation(FA18000201)。
文摘Excited states in the odd-A nucleus 71Ga have been studied via the ^(70)Zn(7Li,a2n)^(71)Ga fusion-evaporation reaction with incident beam energies of 30 and 35 MeV.The level scheme is established up to spin I^(n)=(29/2^(+))and an excitation energy-6.6 MeV.A previously known sequence built on the 9/2^(+) state is extended as a novel rotational band originating from the v(8^(2)_(9/2)alignment.Furthermore,a negative-parity sequence Is also reported.The observed energy levels of Ga have been interpreted in the framework of the nuclear shell model(SM).
基金Supported by National Key Research and Development Program of China(2017YFF0106501)National Natural Science Foundation of China(11905134,11975315,U1932209,11575118,11605114)+3 种基金NSFC-CNNC Joint Project for Nuclear Technology Innovation(U1867210)Continuous Basic Scientific Research Project(WDJC-2019-13)Project funded by China Post-doctoral Science Foundation(2019M652999)and National Natural Science Foundation of Guangdong China(2016A030310042)。
文摘The lifetime of the 2^+1 state in ^106Cd populated via the ^94Zr(^16O,4n)^106Cd reaction has been measured with the Recoil Distance Doppler Shift technique in combination with the Differential Decay Curve Method.By subtracting the contamination in the data,the mean lifetime of the I^π=2^+1633 keV state was determined as 9.9(12)ps.The B(E2)value calculated in this study is in good agreement with the experimental systematics and was compared to the shell model calculations.
